In this conversation at the Lyndon B. Johnson Presidential Library, David and Julie Eisenhower -- the grandson and daughter of presidents -- recall Dwight D. Eisenhower's presidency and later retirement in Gettysburg, Pennsylvania and the relationship between Ike and his vice president, Richard Nixon. Julie Nixon Eisenhower also explains why her father, Richard Nixon, made another run at the presidency after his close loss to John F. Kennedy in 1960.