Chief of the Staff of the Air Force, Gen. David L. Goldfein, talks to Lt. Col. (Ret.) Richard E. Cole, the sole surviving member of the Doolittle Raiders (right) during the 75th Anniversary of the Doolittle Raid Memorial Ceremony at the National Museum of the United States Air Force, April 18, 2017. Also attending was Jeff Thatcher (left), the son of Doolittle Raider Staff Sgt. David Thatcher, who passed in June 2016. (U.S. Air Force Photo/ Wesley Farnsworth)