U.S. Air Force Senior Master Sgt. Thomas Kelly, front left, shakes hands and thanks Ewalt Shatz, a survivor of the attack on Pearl Harbor, during a Pearl Harbor memorial ceremony at the U.S. Pacific Command Joint Intelligence Operations Center in Pearl Harbor, Hawaii, Dec. 6, 2013. Shatz served aboard the destroyer USS Patterson (DD 392). The morning of Dec. 7, 1941, Japanese bombers staged a surprise attack on U.S. military forces in Hawaii. The day after the attack, before a joint session of Congress, President Franklin D. Roosevelt asked for a declaration of war against Japan and the U.S. officially entered World War II.