The Robert J. Collier Trophy is awarded annually, since 1911, for the greatest achievement in aeronautics and astronautics in america, with respect to improving the performance, efficiency, or safety of air or space vehicles, the value of which has been thoroughly demonstrated by actual use during the preceding year. Formerly called the Aero Club of America Trophy, it was renamed the Robert J. Collier Trophy in 1922. The National Aeronautics and Space Administration and its predecessor agency, the National Advisory Committee for Aeronautics (NACA), have received the trophy twenty times since 1929.