The NASA Neil A. Armstrong Flight Research Center (AFRC) is an aeronautical research center operated by NASA. Its primary campus is located inside Edwards Air Force Base in California and is considered NASA's premier site for aeronautical research. AFRC operates some of the most advanced aircraft in the world and is known for many aviation firsts, including supporting the first crewed airplane to exceed the speed of sound in level flight (Bell X-1), highest speed by a crewed, powered aircraft (North American X-15), the first pure digital fly-by-wire aircraft (F-8 DFBW), and many others. AFRC operates a second site next to Air Force Plant 42 in Palmdale, California, known as Building 703, once the former Rockwell International/North American Aviation production facility. There, AFRC houses and operates several of NASA's Science Mission Directorate aircraft including SOFIA (Stratospheric Observatory For Infrared Astronomy), a DC-8 Flying Laboratory, a Gulfstream C-20A UAVSAR and ER-2 High Altitude Platform. As of 2010, David McBride is the center's director. Established as the National Advisory Committee for Aeronautics Muroc Flight Test Unit (1946), the center was subsequently known as the NACA High-Speed Flight Research Station (1949), the NACA High-Speed Flight Station (1954), the NASA High-Speed Flight Station (1958) and the NASA Flight Research Center (1959). On 26 March 1976, the center was renamed the NASA Dryden Flight Research Center (DFRC) after Hugh L. Dryden, a prominent aeronautical engineer who died in office as NASA's deputy administrator in 1965. The facility took its current name on 1 March 2014, honoring Neil Armstrong, a former test pilot at the center and the first human being to walk on the Moon. AFRC was the home of the Shuttle Carrier Aircraft (SCA), a modified Boeing 747 designed to carry a Space Shuttle orbiter back to Kennedy Space Center if one landed at Edwards. The center long operated the oldest B-52 Stratofortress bomber, a B-52B (dubbed Balls 8 after its tail number, 008) that had been converted to drop test aircraft. 008 dropped many supersonic test vehicles, from the X-15 to its last research program, the hypersonic X-43A, powered by a Pegasus rocket. Retired in 2004, the aircraft is on display near Edwards' North Gate. Location Though Armstrong Flight Research Center has always been located on the shore of Rogers Dry Lake, its precise location has changed over the years. It currently resides on the northwestern edge of the lake bed, just south