The Museum of Aviation is the second-largest aerospace museum of the United States Air Force. The museum is located just outside Warner Robins, Georgia, and near Robins Air Force Base. It has a total of five different buildings containing fewer than its previous 93 different aircraft on 51 acres. The SR-71A Blackbird on display is the current record holder for flight airspeed. Serial number 61-7958 set an absolute speed record of 1,905.81 knots on July 28, 1976, which stands today.