On 18 April 1942, airmen of the US Army Air Forces, led by Lt. Col. James H. (Jimmy) Doolittle, carried the Battle of the Pacific to the heart of the Japanese empire with a surprising and daring raid on military targets at Tokyo, Yokohama, Yokosuka, Nagoya, and Kobe. This heroic attack against these major cities was the result of coordination between the Army Air Forces and the US Navy, which carried the sixteen North American B-25 medium bombers aboard the carrier USS Hornet to within take-off distance of the Japanese Islands. Here, a pair of alert escorts follow the USS Hornet to protect her lethal cargo of B-25 bombers. (U.S. Air Force Photo)