This was the second A-12 to be built as an M-21 for launching the D-21 reconnaissance drone. During a flight test on 30 July 1966 for launching the drone, the drone pitched down and struck the M-21, breaking it in half. Pilot Bill Park and Launch Control Officer (LCO) Ray Torick stayed with the plane a short time before ejecting over the Pacific Ocean. Both made safe ejections, but Ray Torick opened his helmet visor by mistake and his suit filled up with water which caused him to drown. This terrible personal and professional loss drove Lockheed's Clarence "Kelly" Johnson to cancel the M-21/D-21 program.