This week, Martha is joined by Chris Wallace, anchor of Fox News Sunday and author of the new book, Countdown 1945: The Extraordinary Story of the Atomic Bomb and the 116 Days That Changed the World.

Chris shares how his goal was to retell important historical events in the genre of a thriller, President Truman's decision in World War II on whether to invade Japan or drop the atom bomb and Chris tells the story of Hideko Tamura-Snider, a survivor of the Hiroshima bombing.

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