A Norwegian teenager who survived the massacre on the island of Utoeya shares his first person account of the story. The teenager found strength at the thought of his friends and family and his only thought was to 'keep on living.' The 2011 Norway attacks were two sequential lone wolf terrorist attacks against the government, the civilian population and a Workers' Youth League (AUF)-run summer camp in Norway on July 22, 2011, claiming a total of 77 lives.

Utoya Survivor of 2011 Norway attack, Adrian Pracon, Recalls the massacre and what was going through his mind at the time. The 2011 Norway shooting was a lone wolf terrorist attack on the government, the citizens, as well as a summer camp run by the Workers' Youth League.

John Murtagh was nine years old when his family's home was bombed by the Weather Underground. His father, a judge, was presiding over a case involving Black Panthers, a group that the Weather Underground supported. Murtagh shares his memories of that night. The Weather Underground was a radical leftist group active from about 1970 to 1981 that conducted a series of high-profile bombings.

Weather Underground co-founder Mark Rudd discusses the regret he still feels and recalls spending many years on the run after being indicted. He served a short jail sentence after turning himself in and became a math instructor at a community college. The Weather Underground was a radical leftist group active from about 1970 to 1981 that conducted a series of high-profile bombings.

FBI informant Larry Grathwohl discusses Bill Ayers and Bernardine Dohrn's plan for America from the perspective of an undercover member of the Weather Underground organization. He remembers plans to re-educate citizens and eliminate the Americans who refused to conform to their post-revolution world.

Weather Underground member Cathy Wilkerson describes being in a Greenwich Village home when a homemade bomb went off on March 6, 1970, killing three of her fellow members. She shares her reaction to the tragic detonation and discusses what she did after the explosion.

A man visiting London after the 2005 bombings tells the public what it was like in the aftermath of the disaster. His first person account discusses feeling a sense of unity and love even in the face of death. On Thursday, July 7, 2005, four Islamist terrorists detonated four bombs – three in quick succession aboard London Underground trains across the city and, later, a fourth on a double-decker bus in Tavistock Square. 52 civilians were killed and over 700 more were injured in the United Kingdom's first suicide attacks.

The families of some Lockerbie victims are outraged after Scotland's decision to free the the terminally ill Lockerbie bomber on compassionate grounds. Their first person account reveals their relationships to the victims and why they want justice. On December 21, 1988, Pan Am Flight 103 (Lockerbie bombing) was a Pan Am transatlantic flight from Frankfurt to Detroit via London and New York City that was destroyed by a terrorist bomb. It killed all 243 passengers and the 16 crew on board.

Firefighters who were first responders at the Sandy Hook Elementary School shooting recall what the scene was like outside the school and comment on the surprising lack of victims to treat. The Sandy Hook shooting happened on December 14, 2012 with twenty children and six adult staff members fatally shot.

Teacher Kaitlin Roig recalls how she took her class of 15 students into a bathroom during the Sandy Hook shooting on December 14, 2012. Roig explains what she did to comfort the students and what happened after the gunfire stopped.