In the 1950s, Convair shifted money and effort to its missile and rocket projects, producing the Terrier missile ship-launched surface-to-air system for the U.S. Navy during the 1960s and 1970s. Convair's Atlas rocket was originally developed in 1957 as an ICBM for the U.S. Air Force. It was replaced in 1962 by the room-temperature liquid-fueled Titan II missile and the solid-fueled Minuteman missile. The Atlas rocket transitioned into a civilian launch vehicle and was used for the first orbital crewed U.S. space flights during Project Mercury in 1962 and 1963.