During his 16 years at Fox, veteran journalist Chris Wallace has covered almost every key political event and interviewed numerous U.S. and world leaders.

Now, he explores the crucial 116 days and events leading up August 6, 1945—the infamous date that President Harry Truman gave the order to unleash the world’s first atomic bomb attack on Hiroshima, Japan.

Hear more of how we got to that pivotal moment as Wallace gives a rare behind-the-scenes account of the secret meetings and iconic figures who changed the course of history forever.