Gregory T. Linteris Status: Retired 10/4/1957 – Nationality: American Type: Payload Specialist First Flight: 4/4/1997 Last Flight: 7/1/1997 Gregory Thomas Linteris, Ph.D. (born October 4, 1957 in Englewood, New Jersey) is an American scientist who flew as a payload specialist on two NASA Space Shuttle missions in 1997. Launches Space Shuttle Columbia / OV-102 | STS-83 Space Shuttle Columbia / OV-102 | STS-94 National Aeronautics and Space Administration Type: Government Abbreviation: NASA Administration: Administrator: Jim Bridenstine Founded: 1958 Launchers: Space Shuttle | SLS Spacecraft: Orion Country: USA The National Aeronautics and Space Administration is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research. NASA have many launch facilities but most are inactive. The most commonly used pad will be LC-39B at Kennedy Space Center in Florida.