Dave talks to Time Magazine's Science Editor Jeffrey Kluger about his new book, Apollo 8: The Thrilling Story of the First Mission to the Moon. His previous book, Apollo 13 was co-written with Jim Lovell, who was an astronaut on both missions. Apollo 8 takes place during the dramatic events of 1968 against the backdrop of the Vietnam War, the assassinations of Martin Luther King and Robert F. Kennedy and riots at the Democratic Connvention in Chicago. After the traumatic events of that turbulent year, the first mission to the Moon comes with a television transmission from lunar orbit on Christmas Eve. As one citizen wrote in a telegram to the crew, "You saved 1968."