On April 19, 1995, the Alfred P Murrah federal building in downtown Oklahoma City became the site for the most deadly peacetime attack on United States soil to date. As hundreds of employees prepared for the day ahead, a truck parked outside the front of the nine storey building. It then exploded.

At precisely 1.23am on 26 April 1986, the world changed forever. In Pripyat, Ukraine in the Soviet Union, the largest nuclear reactor of its kind exploded at the Chernobyl Power Station.

Zero Hour: The Last Hour of Flight 11 dramatically recounts the final sixty minutes of American Airlines Flight 11—an hour, and a flight, that changes the world forever. At 08:46 on the morning of September 11, 2001, Flight 11, a fully fueled Boeing 767, explodes into the North Tower of the World Trade Center in New York City. It is the first terrorist strike on that day of infamy.