9/11: Click here to return

En route from Boston to LosAngeles American Airlines Flight 11, is hijacked and crashes into the World Trade Center (North Tower); United Airlines Flight 175, from Boston to Los Angeles, is hijacked and crashes into the World Trade Center (South Tower); United Airlines Flight 93 from Newark to San Francisco is hijacked and crashes in southwestern Pennsylvania; American Airlines Flight 77 en route from Washington to Los Angeles, is hijacked and crashes into the Pentagon. More than 2,997 are killed, and thousands more are injured. Osama bin Laden, al-Qaeda mastermind Ramzi Ahmed Yousef, and 19 hijackers planned and carried out the attacks. The fiscal damage to the United States resulting from the 9/11 attacks exceeds $16.5 billion with 200,000 jobs lost. The travel industry makes $13 billion less annually since the event. It is estimated that only $400,000.00 to $500,000.00 was spent planning and carrying out the 9/11 attacks. Deaths related to the 9/11 attacks continue to mount as many rescue workers report contracting lung disease from working at Ground Zero in the aftermath of the attacks, and some have died from lung related ailments.

Abdulmutallab, Umar Farouk: Click here to return

After attempting to use plastic explosives hidden in his enderwaer to blow up Northwest Airlines Flight 253 on December 25, 2009, he is being held on six charges that include attempting to use a weapon of mass destruction and attempted murder of 289 people. Before he became known as the "Underwear Bomber," however, Abdulmutallab was raised in Nigeria as the youngest of 16 children to a wealthy family. His father, the former chairman of First Bank of Nigeria, called CIA agents at the Nigerian U.S. Embassy to report his son's extreme religious views and to warn them of a possible attack, but Abdulmutallab's U.S. visa was not revoked, and his name was not added to terror watch lists.

Adana Massacre: Click here to return

Before the April 1909 massacre of up to 30,000 of their people, the Armenians were said to be the most prosperous of the Adana population in the Ottoman Empire.

Ahmadinejad, Mahmoud: Click here to return

This sixth and current president of the Islamic Republic of Iran, Ahmadinejad was an engineer and teacher prior to becoming Mayor of Tehran in 2003. Notably, in his initial presidential campaign, he spoke against the country's relationship with the United States and opposed the veto power of the U.N. Security Council. The controversial leader's reelection in 2009 against Mir-Hossein Mousavi sparked protests across the country and accusations that Ahmadinejad rigged the election.

Ahmed, Farooque: Click here to return

From Ashburn, Virginia, this Pakistani-American was arrested in October 2010 after attempting to supply video surveillance of the Arlington County Metrorail Station to undercover agents posing as al-Qaeda operatives, and offerring to martyr himself. After pleading guilty to the chargers against him, the naturalized American citizen was sentenced on April 11, 2011, to 23 years.

Air France Flight 139: Click here to return

On June 27, 1976, two PFLP members along with two German Revolutionary members hijack Air France Flight 139 while it is en route from Athens to Paris. A female hostage pretending to have a miscarraige is released after the flight is diverted to Libya. Remaining hostages are flown to Entebbe Airport in Uganda, where four more hijackers join. They demand the release of 40 Palestinians held in 14 countries and threaten to kill hostages if their demands are not met. An attempt to free the hostages, known as Operation Entebbe, leaves 49 dead and saves 105 passengers.

al-Qaeda: Click here to return

With military-like training camps in Afghanistan, Pakistan, Iraq, and Sudan, this terror organization handles attacking civilian and military targets throughout the world. Founded and led by Osama bin Laden until his death on May 1, 2011, the radical Islamic group is responsible for the 9/11 attacks on the U.S., the 1998 U.S. Embassy bombings, the 2002 Bali bombings, and many other attacks in Westernized countries.

Al-Qahtani, Mohammed: Click here to return

This Saudi citizen is currently detained at Cuba's Guantanamo Bay for his alleged role in the 9/11 attacks. Thought to be the 20th al-Qaeda terrorist, he was questioned by U.S. authorities after flying into Orlando, Florida, from Dubai.

Al-Shabaab: Click here to return

Al Shabaab is affiliated with al Qaeda and operates primarily our of Somalia's southern and central regions. The group is fighting an insurgency against the internationally recognized Somali Federal Government, which is based in Somalia’s capital, Mogadishu. Al Shabaab has targeted African Union Mission in Somalia (AMISOM) peacekeepers for their support of the federal government. The group has also repeatedly threatened the United States and the West and has demonstrated the capacity to strike beyond Somalia’s borders.

Arafat, Yasser: Click here to return

Although accused by many Israelis to be a terrorist, the Palestinian leader was a Laureate of the Nobel Prize for his joint negotiations of the Oslo Accords and revered by many Arabs. After being pinned down by the Israeli army for more than two years, the 75-year-old Arafat died on November 11, 2004.

Armenian Massacre: Click here to return

The genocide is believed to have started on April 24, 1915, when Ottoman officials arrested 250 Armenians in Constantinople. Much like the German Holocaust that came three decades later, Armenians were rounded up and forced to march without much food or water to Syria. Although there is no official record of how many Armenians were killed, it is believed that more than a million Armenians were exterminated through direct killings, starvation, torture and forced death marches. The Armenian Massacre is memorialized on its April 24th anniversary.

Atef, Mohammed: Click here to return

Believed to be an al-Qaeda military chief, Atef became one of the first al-Qaeda casualties of the United States' War on Terror. He was killed in November 2001 during an air strike near Kabul Afghanistan. In a video released in 2006, Atef appeared to be planning the attacks on the U.S., which would become known as 9/11.

Beltway Sniper: Click here to return

For three weeks in October 2002, John Allen Muhammad and Lee Boyd Malvo terrorized Washington, D.C., Maryland, and Virginia, targeting people with sniper rifles and picking them off, killing 10 and critically injuring three others. While their motives are unknown, a friend reports that Muhammad had stated that the September 11, 2001 terrorist attacks "... should have happened a long time ago ..." Muhammad was executed by lethal injection on November 10, 2009. Malvo was sentenced to six consecutive life sentences without the possibility of parole.

Beslan School Hostage Crisis: Click here to return

For three days in September 2004, Ingush and Chechen Islamic militants held more than 1,000 people‚ including 777 children‚ hostage in a Russian school in Beslan, North Ossetia. The terrorists quickly executed men and older boys, and they strung a series of explosives in strategic locations in the school, including the gymnasium holding the largest group of hostages. The terrorists refused to let the hostages have food or water or even use the restroom, leading to deplorable conditions in the heat of summer. On the third day, a poorly wired bomb is suspected of detonating on its own, provoking Russian Security Forces to storm the school and the terrorists to start shooting their hostages. More than 330 hostages died from the fire in the gymnasium after the explosion or from being shot, and 776 are wounded. Most of the terrorists died in the battle, along with 11 members of the Russian Special Forces.

bin Laden, Osama: Click here to return

A wealthy Saudi Arabian whose father profited mostly from the construction industry, Osama bin Laden, became the founder, mastermind, and leader of al-Qaeda. Raised a devout Wahhabi Muslim, he was believed to have studied civil engineering at King Abdulaziz University in Saudi Arabia, before dropping out after three years and moving to Pakistan with fellow al-Qaeda founder Abdullah Azzam and fighting in the Soviet War in Afghanistan. It is suspected that the United States' involvement in the Iraqi invasion of Kuwait is what turned bin Laden's attention toward the West to begin plotting against the U.S. This later brought about horrific acts of terror such as the September 11, 2001 events across the U.S. East coast, killing nearly 3,000. On May 1, 2011, after a decade of searching for him, bin Laden was killed by Navy Seal Team Six, officially known as the Naval Special Warfare Development Group, who spent months tracking bin Laden, to a compound in Abbottabad, Pakistan. In a burst of fire lasting over 40 minutes, bin Laden, along with five others, are dead. Prior to the engagement, intelligence analysts had studied the compound extensively, and after confirming the terrorists' presence, President Barack Obama gave the order for the operation to commence. By 7:00 p.m., preliminary DNA analysis confirmed bin Laden as one of the dead, the other four include bin Laden's adult son, two of his couriers, and an unidentified woman. No Americans are killed in the attack. The next day, bin Laden is buried in the North Arabian Sea.

Black Hawk Down: Click here to return

Also known as the Battle of Mogadishu or Battle of the Black Sea, this skirmish was fought on October 3-4, 1993 in Somalia as part of the United States' military campaign Operation Gothic Serpent. Black Hawk Down included 19 aircraft, 12 vehicles, and 160 soldiers, whose mission was to capture leaders of the Habr Gidr clan. Rocket-propelled grenades fired upon and shot down two U.S. Black Hawk helicopters. Armed Somalis descended upon the crash site, recovering and dragging the bodies of American soldiers through the streets. After 11 days of negotiations the only captive, Michael Durant, returned to the U.S., along with the mangled bodies of the 18 dead soldiers.

Bojinka Plot: Click here to return

In late 1994, early 1995, Philippine investigators uncover a large terror plot orchestrated by Ramzi Yousef and Khalid Shaikh Mohammed, and funded by al-Qaeda, suspected to be the catalyst to the 9/11 terrorist attacks on the United States. The plan's four major, original components were: 1) Assassinate Pope John Paul II on a visit to Manila in January 1995; 2) Create undetectable bombs to be smuggled onto 11 U.S. jumbo jets entering the United States from Asia; 3) Coordinate training of Islamic pilots at U.S. schools and then fly airliners into buildings such as the Pentagon, World Trade Center, Sears Tower, Transamerica Tower, and a U.S. nuclear facility; and 4) Assassinate U.S. President Bill Clinton during visits to the Philippines. The fourth part was rejected to focus on the other three plots. A chemical fire in the terrorists' apartment tipped off police on Jan. 6-7, 1995, but not before Yousef detonated test bombs in a movie theater and a mall in the Philippines, as well as on Philippine Airline Flight 434, killing one person.

Chesser, Zachary Adam: Click here to return

Under the name Abu Talhah al-Amrikee, this American-born Muslim convert, in e-mail correspondence with Anwar al-Awlaki, createa a jihadist website where he warns of violent retribution on the creators of South Park, an animated television show, for depicting the prophet Muhammad. He is arrested July 20, 2010, while attempting to fly to Uganda with his infant son. He later admits his final destination would be to Somalia to join terrorist group Al-Shabaab. Chesser pled guilty on October 20, 2010, to three felonies, including attempting to provide material support to a terrorist organization and terroristic threatening, and was sentenced to 25 years in prison.

Dawson's Field Hijackings: Click here to return

On September 6, 1970, four planes are simultaneously hijacked by PFLP gunmen and forced to fly to Dawson's Field in the Jordanian desert. All passengers are released with the exception of 56 crew members and Jewish passengers. The PFLP blows up the empty planes and demands the body of Patrick Arguello and the release of Leila Khaled, who had previously failed in their attempt to hijack El Al Flight 219, which resulted in Arguello dying in the ambulance on his way to the hospital and the British government's arrest of Khaled.

Egypt Air Flight 648: Click here to return

Three Palestinian members of the Abu Nidal Organization hijack Egypt Air Flight 648, headed from Athens to Cairo, on November 23, 1985. Often remembered as one of the world's bloodiest plane hijackings before 9/11, it is an example of the incorrect way to deal with hijackers. An Egyptian Security Service member opened fire on the hijackers, killing one, but is then shot dozens of times and killed. Because of the heavy bullet fire, the plane's fuselage is punctured, and the pilot is forced to descend to an altitude where the passengers can breathe. Due to a lack of fuel, the plane is forced to land in Malta where a standoff commences. Although 11 passengers and two injured flight attendants are released, the approach of the Maltese prime minister results in the execution of two American passengers. Later, Egyptian commandos storm the plane, and 56 more passengers are killed. Out of the 92 original passengers, 60 are killed. Omar Mohammad Ali Rezaq, the lead terrorist, is injured during the attack and pretends to be an injured passenger. He is arrested at St. Luke's General Hospital and is eventually sentenced to life in prison in the United States.

El Al Flight 426: Click here to return

On July 23, 1968, three members of the Popular Front for the Liberation of Palestine (PFLP) hijack El Al Flight 426. The flight is originally scheduled to fly from London to Israel with a stop in Rome, but the hijackers divert the flight to Algiers. A year earlier, Algiers declares war on Israel. After landing, all except the 12 Israeli passengers and 10 crew members are released. More hostages are released at the end of the week, but it takes 40 days of negotiations to reach an agreement where all, including the hijackers, are released.

Ethiopian Airlines Flight 961: Click here to return

On November 23, 1996, three Ethiopians seeking political asylum in Australia, hijack Ethiopian Airlines Flight 961, carrying 172 passengers and crew members. Due to the plane's low fuel supply, Captain Leul Abate attempts to find a runway at Prince Said Ibrahim International Airport in the Comoros Islands. When he is unable to locate the airport, he is forced to land in shallow waters. Although many residents and tourists try to assist the victims, 122 still die in the ordeal, including all three hijackers.

Fatwa (Osama bin Laden): Click here to return

Osama bin Laden wrote two fatwas, or Islamic legal announcements, one in 1996 and the other in 1998. The first was titled "Declaration of War against the Americans Occupying the Land of the Two Holy Places," and was faxed to supporters around the world. His February 1998 fatwa, signed by four others‚ Ayman al-Zawahiri, Ahmed Refai Taha, Mir Hamzah, and Fazul Rahman‚ encourages indiscriminate killing of Americans and Jews for their offenses against Islam and aid to Israel. Shortly after, several American embassies were bombed by al-Qaeda-linked groups.

Gorbey, Michael S.: Click here to return

On January 18, 2008, the 38-year-old was arrested while wearing a bulletproof vest and attempting to approach the U.S. Capitol with a loaded shotgun, a three-foot-long sword, and 31 rounds of ammunition, according to authorities. In his truck, which allegedly sat in a government parking lot for three weeks unnoticed, authorities also found a device containing gunpowder duct taped to a box of shotgun shells and a bottle containing buckshot or BB pellets. By August 2008, he had been convicted by a jury and sentenced to 22 years in prison.

Hamas: Click here to return

Growing out of the Muslim Brotherhood, this Islamic fundamentalist group was originally a religious and charitable organization between the 60s and 80s. According to the Council on Foreign Relations, Hamas (Harakat Al-Muqawama Al-Islamia, or Islamic Resistance Movement) brings in about $70 million from expatriate Palestinians and private Middle Eastern donors. The U.S. listed them as a terrorist organization in 2001.

Hamidian Massacres: Click here to return

The first in a succession of genocidal rages against Armenians, the Ottoman Empire began targeting Armenians in Anatolia in 1894 due to the "endless persecutions and hostilities of the Christian world." The massacres would end in 1896 with approximately 300,000 dead.

Hasan, Nidal Malik: Click here to return

November 5,2009, just weeks before his scheduled deployment to Afghanistan, American-born Palestinian Nidal Hasan allegedly opened fire at the Soldier Readiness Center in Fort Hood, Texas, killing 13 and wounding 30. After a short pursuit, Sgt. Kimberly D. Munley and Sgt. Mark Todd exchanged shots with Hasan. Munley was hit two times, while Todd shot Hasan, disabling him. The now-paralyzed soldier will face a general court-martial trial where he could face the death penalty.

Hasan, Nidal Malik: Click here to return

Hezbollah: This Shi'a radical Muslim militant group is based out of Lebanon and started out as a small militia in the early 1980s. It has since grown into a major political power in Lebanon, known for its ties with organizations such as al-Qaeda, and relies heavily on Muslim donations originating in Iran and Syria for its funding, as well as multimillion-dollar cigarette and drug smuggling operations Paraguay, Argentina, and Brazil. Several suicide bombings and terrorist attacks have been attributed to Hezbollah.

Hussein, Saddam: Click here to return

The fifth president of Iraq, this ruthless leader of the Ba'ath Party began his rule July 16, 1979, at age 42. During the 1980s, he led Iraq in a war against Iran, while killing thousands of Kurds with chemical weapons during the same decade. In 1990, he invaded Kuwait, looting their lands and people until the U.S. stepped in a year later, initiating the Gulf War. The brutal dictator remained in power, however, until Iraq was invaded by the United States in 2003. He was captured on December 13, 2003, and later executed by hanging on December 30, 2006, by the Iraqi interim government.

Ilyas Kashmiri: Click here to return

Designated a terrorist by the United States in August 2010, Ilyas Kashmiri was a senior al-Qaeda member whose extensive involvement in that group and connection to the Soviet-Afghan War, the Kashmir conflict, as well as attacks against India, Pakistan and the United States, put him in line as Osama bin Laden's successor as leader of the terrorist organization. However, he was allegedly killed during a June 3, 2011, Predator airstrike in South Waziristan, Kashmiri. A drone fired three missiles into the compound killing nine people, and although U.S. intelligence officials cannot confirm his death, a statement made by Islamic fundamentalists Harkat-ul-Jihad-al-Islami (HUJI) on June 4 warned they would avenge Kashmiri's death. One U.S. official stated, "HUJI's statement is a sure sign we got him, we are pretty confident he is dead." Kashmiri also served as the operational Chief of HUJI.

Ivins, Bruce E.: Click here to return

After the FBI connected him to the 2001 anthrax attacks, the 62-year-old committed suicide by overdosing on Tylenol. Although no formal charges were ever brought against the senior biodefense researcher working for the U.S. Army Medical Research Institute of Infectious Disease, the FBI concluded that Ivins wanted to bolster support for a vaccine he helped create and that he targeted two lawmakers because they were Catholics who supported pro-choice views. The FBI holds him solely responsible for the mailings to members of Congress and media in September and October 2001, causing the death of five and injury of dozens.

Kurdistan Freedom Hawks, (TAK): Click here to return

The TAK is a militant group that has committed attacks throughout Turkey and primarily operates in southern Turkey and northern Iraq with a goal of securing Kurdish secession from Turkey.

LaRose, Colleen‚ a.k.a. Jihad Jane: Click here to return

This 46-year-old Pennsylvania woman was arrested in Philadelphia in October, but her case was kept under seal. Although the indictment does not identify the target, law enforcement officials say her case was linked to the arrests of seven Muslims in Ireland in connection with a scheme to kill the cartoonist, Lars Vilks, after an al-Qaeda-linked group put a $100,000 bounty on his head for a Muhammad cartoon he drew, which the group perceived as an insult to Islam.

Lufthansa Flight 181: Click here to return

On October 13, 1977, four militant PFLP Palestinians, calling themselves the Commando Martyr Halime, hijack Lufthansa Flight 181 to Frankfurt in midair. They invade the cockpit with a pistol and demand the flight be rerouted to Cyprus; however, due to a lack of fuel it is instead diverted to Rome. It ultimately travels to Cyprus, Bahrain, Dubai, and Aden before staying in Mogadishu. West German counterterrorism group GSG 9 performs Operation Feuerzauber, killing two hijackers and wounding the others. All 86 passengers survive.

Malaysia Airlines Flight 653: Click here to return

Approximately 30 minutes after takeoff on December 4, 1977, Malaysia Airlines Flight 653 captain, G.K. Ganjoor, reports an "unidentified hijacker" is on board, and that they are redirecting to Singapore, after which communication is lost and the plane crashes in Kampong Ladang, Tanjong Kupang. All 93 passengers and seven crew members are killed, with the Malaysian Public Works Department Head and the Cuban Ambassador to Japan among the dead. Although there is no evidence, a member of the Japanese Red Army is rumored to be responsible; three decades later, it remains a mystery.

Martinez, Antonio: Click here to return

Accused of planning to bomb a military recruitment center in Maryland, the 21-year-old was a recent convert to Islam when the FBI arrested him on terrorism charges in December 2010. They allege Martinez, a.k.a. Muhammad Hussain, of buying what he believed to be a vehicle full of explosives from undercover FBI agents and attempting to use it at the Armed Forces Career Center. He is being held pending a federal trial.

Mohamed, Osman Mohamud: Click here to return

Authorities arrested the 20-year-old Somali-American November 26, 2010, while he attempted to set off a dummy car bomb at a Christmas tree lighting in Portland, Oregon. Undercover FBI agents, who were later accused of entrapping the former Oregon State University student, sold the fake bomb to Mohamed.

Miami Bomb Plot: Click here to return

The Liberty City Seven was a seven-member crew, based out of Miami, Florida, who attempted to buy weapons from undercover FBI agents posing as al-Qaeda operatives, with the intention of blowing up the Sears Tower in Chicago. Narseal Batiste, the group's ringleader, was the only defendant to be convicted on all four charges initially brought up against the accused. One defendant was acquitted and the other five were charged on some of the counts.

Muhammad, Khalid Sheikh: Click here to return

Charged with war crimes in 2008 and believed to be the architect of the 9/11 attacks, this Kuwait-born al-Qaeda member faces the death penalty if convicted and is being held in Guantanamo Bay. According to U.S. government officials, he has confessed to many significant terrorist plots in the last two decades, including the first World Trade Center bombing, the murder of Daniel Pearl, and the failed Bojinka Plot. However, Muhammad has gained international attention after the Human Rights Watch claimed he was tortured via waterboarding.

Munich Massacre: Click here to return

Several members of the Israeli Olympic Team were taken hostage and killed by the Palestinian terror group, Black September, at the 1972 Summer Olympics in Munich, Germany. The terrorists gunned down 11 athletes and coaches, as well as one German police officer, during the rescue attempt. In the end, officers killed five of the eight terrorists and captured the remaining three, who were later released following the Black September hijacking of a Lufthansa airliner.

Northeast Blackout of 2003: Click here to return

The outage was estimated to cost more than $10 billion USD. And although terrorism was ruled out as a cause, a communique‚ attributed to al-Qaeda claiming responsibility states, "It is a message to all the investors that the United States is no longer a safe country for their money, knowing that the U.S. economy greatly relies on the trust of the investor."

Oklahoma City Bombing: Click here to return

On April 19, 1995, a Ryder truck carrying 4,800 pounds of ammonium nitrate fertilizer exploded in the parking garage of the Alfred P. Murrah Federal Building in downtown Oklahoma City, beneath the building's daycare, killing 168 people‚ including 19 children under the age of six‚ and injuring more than 680. The crime, carried out by Timothy McVeigh and Terry Nichols, caused about $652 million in damage. Within 90 minutes, McVeigh was arrested after being stopped for driving without a license plate and unlawfully carrying a weapon. McVeigh was executed by lethal injection on June 11, 2001, and Nichols was sentenced to life in prison. On April 19, 2000, the Oklahoma City National Memorial was raised at the Murrah Federal Building, commemorating the victims.

Pan American 707: Click here to return

At an airport terminal in Rome, Italy, five terrorists destroyed one aircraft‚ Pan American 707‚ killing 29 people. The terrorists hijacked another aircraft, a Lufthansa Boeing 727, and forced the pilot to fly them and their hostages to Beirut. However, Lebanese authorities refused to allow the plane to land, so it was rerouted to Athens where Greek authorities complied with their demands of releasing two Arab terrorists. After landing in Kuwait later, the terrorists released their hostages in return for passage to an unknown destination. The Palestine Liberation Organization disavowed the Lufthansa hijacking, and no group has claimed responsibility for it.

Padilla, Jose: Click here to return

Also known as Abdullah al-Muhajir, this 40-year-old New York native converted to Islam while serving time in jail. He was arrested on May 8, 2002 at the Chicago O'Hare International Airport‚ returning from a trip to Egypt, Saudi Arabia, Afghanistan, Pakistan, and Iraq. He was suspected of plotting a radiological bomb attack (also known as a dirty bomb) and detained as a material witness. On August 16, 2007, he was convicted and sentenced to 17 years in prison on charges of conspiring to kill people in an overseas jihad and funding terrorism.

Pan Am Flight 73: Click here to return

Four members of the Abu Nidal Organization hijack Pan Am Flight 73, from Pakistan to Frankfurt, while it was preparing for takeoff September 5, 1986. The crew escapes through an overhead hatch in the cockpit, but when the hijackers demands, that the flight crew return to the plane, are not met, the hijackers execute an Indian-American passenger. As Pakistani authorities prepare to storm the plane, a grenade is thrown and shooting commences, during which 20 passengers are killed. The hijackers were arrested and sentenced to death in Pakistan. However, they were later released against the wishes of the United States and India.

Pearl, Daniel: Click here to return

Al-Qaeda kidnapped the American Wall Street Journal reporter on January 23, 2002, while he was in Pakistan researching alleged links between Richard Reid (the "Shoe Bomber") and the terrorist organization. He was abducted while attempting to meet with Sheikh Mubarak Ali Gilani for an interview. Nine days later, when the U.S. government did not meet the terrorists' demands to release Pakistani detainees and supply Pakistan with a fleet of F-16 fighter jets, they beheaded Pearl, releasing the video evidence of the murder on February 21, 2002.

Rahman, Sheik Omar Abdel (the blind sheik): Click here to return

This blind Egyptian Muslim leader, a former New York City resident, was convicted of seditious conspiracy on October 1, 1995, for helping plan the 1993 World Trade Center bombing. He is serving a life sentence at the Butner Medical Center in Butner, North Carolina. He is said to be the leader of the militant Islamic Group, which is responsible for numerous terrorist acts.

Ramzi Ahmed Yousef: Click here to return

He is one of the main architects of the Bojinka Plot, who had hoped the attack would bring about 250,000 deaths. He was quoted as saying, "Our calculations were not very accurate this time. However, we promise you that next time it will be very precise, and the Trade Center will be one of our targets."

Reid, Richard: Click here to return

Born in Bromley, South London, Reid became involved with an Islam extremist Mosque in North London and went to Pakistan to train at terrorist camps in Afghanistan where he allied with al-Qaeda.

Shahzad, Faisal: Click here to return

The Pakistan-born accountant from Shelton, Connecticut, was arrested about 53 hours after he attempted to detonate a bomb in New York City's Times Square. Two street vendors alerted authorities after they spotted smoke coming from Shahzad's parked Nissan Pathfinder. Officers found a bomb had been ignited but failed to explode. Federal agents arrested the suspected terrorist in the John F. Kennedy Airport after he'd boarded a plane headed for Dubai. Shahzad later confessed he'd traveled to Pakistan in the summer of 2009 where he received bomb-making training in Waziristan. After pleading guilty to 10 terrorism-related charges, he was sentenced to life in prison without the possibility of parole.

Stack III, Andrew Joseph: Click here to return

After setting his house on fire and crashing his single-engine Piper Dakota plane into Building 1 of the Echelon office complex in Austin, Texas, February 18, 2010, authorities found a note posted on his website addressed to the IRS offices located there. The note chronicled his history of problems with the IRS and closed with, "Well, Mr. Big Brother IRS man, let's try something different, take my pound of flesh and sleep well." One person was killed as a result, and 13 were injured.

TWA Flight 847: Click here to return

The hijacking of TWA Flight 847 became a two-week ordeal, starting June 14, 1985. Orchestrated by six members of Hezbollah and Islamic Jihad, the plane‚ scheduled to travel from Athens to Rome‚ is hijacked just after takeoff and diverted to Beirut where 19 passengers are released. Afterward, it is flown to Algiers where 20 additional passengers are released, and then returned to Beirut where U.S Navy Seabee diver, Robert Stetham, is beaten, shot to death, and dumped onto the ramp. Although the hijackers make several demands, they eventually release 40 remaining hostages unharmed. German officials release hijacker Mohammed Hammadi in exchange for a German anthropologist held by Hezbollah after finishing only 19 years of a 25-year sentence. Three of the hijackers are indicted by the United States District Court and later placed on the FBI Most Wanted Terrorists list by President George W. Bush.

Wahhabi movement: Click here to return

This religious movement was developed in the 18th century in Saudi Arabia and is the most dominant form of Islam in that region. Its founder, Mohammad Ibn Abd-al-Wahhab believing Islam had become too impure and lenient, preached that worshippers needed to get back to stricter, literal teachings of the Koran.