This week in Edwards history Published June 15, 2017 By 412th Test Wing Public Affairs EDWARDS AIR FORCE BASE, Calif. -- On June 15, 1964, the first Douglas B-26K counter-insurgency aircraft was ferried to Edwards to begin limited Category II evaluation for the Aeronautical Systems Center. The B-26K was a modification of Korean War-era Douglas B-26Bs adapted for combat service in Vietnam and later was redesignated A-26A.