2018-11-122018-11-121954-06-21https://hdl.handle.net/2152.3/10664A Kodacolor Print by the Eastman Kodak Company, of the Del Mar DF-1 Frangible Target device, taken in Yuma, Arizona in 1954.Dr. William ThorntonDel MarYuma ArizonaDF-1 Frangible TargetresearchROFEIRadar Optic Firing Error IndicatorKodacolor PrintEastman Kodak