In late 1957, Lockheed's Skunk Works facility under the direction of Clarence Johnson[1][16] began developing stealthy subsonic reconnaissance aircraft, but in the spring of 1958 turned to supersonic designs, known as the Archangel series. Convair's advanced development group under Robert Widmer was invited to compete with Lockheed, and they proposed the FISH parasite aircraft, derived from their Super Hustler concept. In June 1959, the B-58B launch aircraft for FISH was canceled and the Convair KINGFISH design was proposed.