Members of the public get a closer look at a B-25 Mitchell Bomber at Grimes Field, Ohio, April 15, as B-25 crews arrive to participate in commemoration flights for the Doolittle Raiders' 68th reunion to be held at the National Museum of the U.S. Air Force at Wright Patterson Air Force Base, Ohio. The event honors the anniversary of the Doolittle Tokyo Raid. On April 18, 1942, U.S. Army Air Forces Lt. Col. Jimmy Doolittle squad of 16 B-25s bombed targets over Japan in response to the Japanese attack on Pearl Harbor.