March 2006 was scheduled for the X-37's first free flight but a snow storm covered the area, dropping snow on the Mojave. The next flight attempt in March was canceled due to high winds. In late March the X-37 flew, but a flaw prevented the free flight and the vehicle returned to the ground still docked with its White Knight carrier. In April 2006, the X-37 made its first free glide flight. During landing the vehicle ran off the runway. After the vehicle was repaired, the program moved from Mojave to Air Force Plant 42 (KPMD) in Palmdale, California for the remainder of the flight test program. White Knight continued to be based at Mojave, but would ferry over to Plant 42 when flights were scheduled. Five additional flights were performed, at least one of which is believed to have been a free flight with a successful landing.