April 6, 1951 - Capt. Charles "Chuck" Yeager made a flight in the NACA's X-1 (46-063) for the motion picture Jet Pilot.
April 24, 1961 - Essex Movie Productions began filming scenes at Edwards Air Force Base and NASA Flight Research Center (FRC) for the motion picture X-15, starring James Gregory, Charles Bronson and Mary Tyler Moore. Milt Thompson served as a technical advisor.
April 1, 1963 - First non-airborne ground tow of M2-F1. Pilot: Milt Thompson.
April 5, 1963 - First airborne ground tow of M2-F1. Pilot: Milt Thompson.
April 23, 1963 - First M2-F1 free flight from ground tow. Pilot: Milt Thompson.
April 16, 1964 - Bell Aircraft delivered Lunar Landing Research Vehicle (LLRV) No. 1 to NASA FRC.
April 13, 1967 - Series creator Gene Roddenberry and cast members James Doohan and DeForest Kelley from the Star Trek television series visited NASA FRC.
April 1, 1970 - Don Mallick made his first flight in YF-12A (60-6935) with U.S Air Force Maj. Sam Ursini.
April 14, 1971 - Rocketry pioneer Werner von Braun visited NASA FRC.
April 26, 1976 - The NB-52B (52-0008) was transferred to NASA on permanent loan.
April 2, 1980 - Tom McMurtry made the first 15-degree wing sweep flight in the AD-1 oblique-wing research airplane, to evaluate stability at high angle of attack.
April 8, 1984 - Einar Enevoldson and Marta Bohn-Meyer delivered F-14A (158613) from NAS Patuxent River, Md., to NASA Dryden Flight Research Facility (DFRF).
April 9, 1985 - Space Shuttle Orbiter Atlantis (OV-104) arrived at NASA DFRF following land rollover from Palmdale.