Chris Wallace, longtime journalist and anchor of Fox News Sunday, discusses his new book, “Countdown 1945: The Extraordinary Story of the Atomic Bomb and the 116 Days that Changed the World,” exploring the days leading up to the first use of the atomic bomb in wartime. David Martin, national security correspondent for CBS News, moderates. Order Countdown 1945: The Extraordinary Story of the 116 Days that Changed the World by Chris Wallace through the link below. The first 200 orders will receive a signed bookplate to insert in your book (shipped separately from Harvard Book Store). Questions? Email info.