American test pilot and astronaut (1921-1966) who was killed when his F-104 Starfighter chase plane collided with an XB-70 Valkyrie; Walker had been flying in a tight group formation for a publicity photo, and was knocked out of control by the supersonic bomber's wake. Vintage glossy 8 x 10 NASA photo of Walker posing alongside his plane, signed in blue ink. In fine condition, with a few trivial creases and a paperclip impression to top edge. RR Auction COA.
