Air Force Reservist Lt. Col. Lew Harding, 314th Air Refueling Squadron, director of operations, gives a KC-135 tour to Maj. (Retired) Vernon Byrd, the author of "Passing Gas: The History of Inflight Refueling" at Beale Air Force Base, Calif., June 10, 2006. Major Byrd's visit was in conjuction with a video interview to be used during festivities for the 50th Anniversary of the KC-135. (U.S. Air Force photo/Stacey Knott)