April 26, 1986: The world’s worst nuclear accident is a story of miscalculation and obsession—a disaster that will bring an entire empire to its knees.

September 11, 2001: The moment terrorists board a flight in Boston to the moment the plane slams into the North Tower of the World Trade Center in New York City—it’s the first blow on that momentous and tragic morning in September.

April 20,1999: A month from graduation, two boys enter their high school armed like a small army. In one hour they carry out a massacre that shocks the world and continues to reverberate to this day.

March 20, 1995: The release of the deadly nerve gas, Sarin, in the Tokyo subway system marks the first use of a ‘weapon of mass destruction’ by a terrorist organization on an unsuspecting civilian population.

October 12, 2002: At precisely 23:08 on a balmy October evening, two explosions rip through a popular nightclub district on the island of Bali. 202 innocent lives, mostly Australian tourists, are lost as Al Qaeda lays claim to its biggest strike since 9/11.

April 19, 1995: On a beautiful, spring morning, a yellow rental truck pulls up outside the Alfred P. Murrah Federal building in downtown Oklahoma City. Two minutes later, the truck explodes, taking with it the face of the nine-story building and 168 victims.