This Week on History Happy Hour: As we approach the 80th anniversary of the atomic bomb, HHH alum Garrett Graff has come out with a new oral history of the development of the bomb: The Devil Reached Toward the Sky.

Chris and Rick will explore with him the breakthroughs and the breakneck pace of atomic development in the years leading up to 1945, what it was like inside the bombers carrying Little Boy and Fat Man and finally to ground zero at Hiroshima and Nagasaki.

Garrett M. Graff is a journalist, historian, producer, and speaker. He taught at Georgetown University for seven years, including courses on journalism and technology, and his writing and commentary has appeared in publications like the Washington Post, The Wall Street Journal, New York, Bloomberg. He appeared on History Happy Hour to talk about his D-Day Oral History, When the Sea came Alive. His book Watergate: A New History was a Pulitzer Prize finalist. He is also the author of The Only Plane in the Sky, an oral history of 9/11. He lives in Montpelier, Vermont.