American pilot and physicist (1921-1966) who reached the edge of outer space on two separate X-15 aircraft flights in 1963; he tragically passed away when his F-104 Starfighter crashed during a publicity photo shoot. Vintage glossy 8 x 10.5 head-and-shoulders photo of Walker smiling in his X-15 flight suit, signed and inscribed in blue ballpoint, "To the Brownes! Joe Walker.” In very good condition, with a paperclip impression to the top edge, scattered light creasing, and a heavier long vertical crease that passes through the tip of his left ear.Format: Signed photo