sentences:  The Jet Propulsion Laboratory (JPL) at the California Institute of Technology was an Army research operation at that time, years before NASA.It was JPL that designed the Corporal system and later was the R&D designer of the Sergeant.At a 1954 meeting of the Spaceflight Committee of the American Rocket Society, von Braun proposed placing a satellite into orbit using the Redstone with clusters of small solid-fuel rockets on top.