File:Sergeant missile aft motor section impacted the ground at White Sands Missile Range, New Mexico 293-2589.gif

English: In January 1956, JPL conducted a flight test of the Sergeant solid propellant guided missile. This image shows the aft motor section of Round Two, which impacted the ground at White Sands Missile Range in New Mexico. A series of eight feasibility flights from 1956 to 1957 "...evaluated the development of a propulsion and airframe vehicle and served as flight tests of early versions of the guidance and launching elements of the system." Later phases of testing were referred to as experimental model rounds and engineering model rounds, and the missile design was constantly refined, based on testing results. The work was done under contract to the U.S. Army Ordnance Corps.