68th Doolittle Raiders Reunion

Vintage B-25 Mitchell bombers fly over the National Museum of the U.S. Air Force at Wright-Patterson Air Force Base, Ohio, during a memorial flight honoring the Doolittle Tokyo Raiders on April 18, 2010. The 68th Doolittle Raiders' reunion commemorates the anniversary of the Doolittle Tokyo Raid. On April 18, 1942, U.S. Army Air Forces Lt. Col. Jimmy Doolittle's squad of 16 B-25 Mitchell aircraft bombed targets in Japan responding to the attack on Pearl Harbor. (U.S. Air Force photo/Tech. Sgt. Jacob N. Bailey)

68th Doolittle Raiders Reunion

A vintage B-25 Mitchell bomber flies near the National Museum of the U.S. Air Force at Wright-Patterson Air Force Base, Ohio, during a memorial flight honoring the Doolittle Tokyo Raiders on April 18, 2010. The 68th Doolittle Raiders' reunion commemorates the anniversary of the Doolittle Tokyo Raid. On April 18, 1942, U.S. Army Air Forces Lt. Col. Jimmy Doolittle's squad of 16 B-25 Mitchell aircraft bombed Japanese targets in response to the attack on Pearl Harbor. (U.S. Air Force photo/Tech. Sgt. Jacob N. Bailey)

68th Doolittle Raiders Reunion

Vintage B-25 Mitchell bombers stand ready to start engines and take off from the National Museum of the U.S. Air Force at Wright-Patterson Air Force Base, Ohio. They will join a 17-ship formation to take part in a memorial flight honoring the Doolittle Tokyo Raiders on April 18, 2010. The 68th Doolittle Raiders' reunion commemorates the anniversary of the raid on April 18, 1942, by U.S. Army Air Forces Lt. Col. Jimmy Doolittle's squadron of 16 B-25 Mitchell bombers. The raid onTokyo was in response to Japan's attack on Pearl Harbor. (U.S. Air Force photo/Tech. Sgt. Jacob N. Bailey)

Doolittle Raiders 68th reunion

James Doolittle's goblet (upper left) and the goblets of other Doolittle Raiders who have passed are displayed at the Goblet Ceremony in Fairborn, Ohio, April 16, 2010. The ceremony honors all who participated in the Doolittle Raid on Tokyo during World War II. The downturned goblets represent aircrew members who have not survived. During the ceremony the name of every person is read and an attending Doolittle Raider responds to indicate the spirit of those who have passed are present. The set of goblets is now maintained by the National Museum of the U.S. Air Force at Wright-Patterson Air Force Base, Ohio. (U.S. Air Force photo/Lance Cheung)

Doolittle Raiders 68th reunion

C.V. Glines (far left), Doolittle Raiders historian and author, moderates a question and answer session between news media and Doolittle Raiders April 16, 2010, at the National Museum of the U.S. Air Force at Wright-Patterson Air Force Base, Ohio. Answering questions were (left to right) Lt. Col. Richard E. Cole, Lt. Col. Robert L. Hite, Maj. Thomas Griffin and Master Sgt. David J. Thatcher. (U.S. Air Force photo/Lance Cheung)

68th Doolittle Raiders Reunion

Thousands of visitors attend the Doolittle Raiders' 68th reunion at the National Museum of the U.S. Air Force, Wright-Patterson Air Force Base, Ohio, April 16, 2010. The event commemorates the anniversary of the Doolittle Raid on Tokyo. Visitors waiting for autographs arrived hours early and formed lines that wound through multiple galleries and corridors. (U.S. Air Force photo/Tech. Sgt. Jacob N. Bailey)