10 June 1969: The U.S. Air Force donated the first North American Aviation X-15, serial number 56-6670, to the Smithsonian Institution for display at the National Air and Space Museum. The first of three X-15A hypersonic research rocketplanes built by North American for the Air Force and the National Advisory Committee (NACA, the predecessor of NASA), 56-6670 made the first glide flight and
Robert F. Titus was a brigadier general and a career fighter pilot in the United States Air Force. Titus flew a combined total of 500 combat missions in Korean War and Vietnam War, and was credited in destroying 3 enemy aircraft in aerial combat during the Vietnam War…
Titus took part in the zero-length-launch tests, in which an F-100 was launched from a truck by a 300,000-pound thrust booster attached to the aircraft. In 1959, he participated in an historic trans-polar flight from United Kingdom to the United States in the F-100 Super Sabre, for which he received a second Distinguished Flying Cross.(1)
Source: (1) Wikipedia
He retired in 1977, after 32 years of distinguished service
