The first Lark missile launched by Air Force from Cape Canaveral, the last of the three missiles launched in 1950 at the LRPG.
Bibliography:
17 - Emme, Eugene M, Aeronautics and Astronautics: An American Chronology of Science and Technology in the Exploration of Space 1915-1960, NASA, 1961. HTML when accessed: http://www.hq.nasa.gov/office/pao/History/timeline.html
39 - Gunston, Bill,, Rockets and Missiles, Salamander, London, 1979.