Karol Joseph "Bo" Bobko is an American aerospace engineer, retired U.S. Air Force officer, test pilot, and a former USAF and NASA astronaut.

Robert Laurel Crippen is an American retired naval officer and aviator, test pilot, aerospace engineer, and retired astronaut. He traveled into space four times: as Pilot of STS-1 in April 1981, the first Space Shuttle mission; and as Commander of STS-7 in June 1983, STS-41-C in April 1984, and STS-41-G in October 1984. Crippen received the Congressional Space Medal of Honor.

Charles Gordon Fullerton was a United States Air Force colonel, a USAF and NASA astronaut, and a research pilot at NASA's Dryden Flight Research Facility, Edwards, California.[1] His assignments included a variety of flight research and support activities piloting NASA's B-52 launch aircraft, the Boeing 747 Shuttle Carrier Aircraft (SCA), and other multi-engine and high performance aircraft. Fullerton, who logged more than 380 hours in space flight, was a NASA astronaut from September 1969 until November 1986 when he joined the research pilot office at Dryden. In July 1988, he completed a 30-year career with the U.S. Air Force and retired as a colonel. He continued in his position of NASA research pilot as a civilian. Fullerton and his wife and their two children lived in Lancaster, California.

Robert Franklyn "Bob" Overmyer was an American test pilot, naval aviator, aeronautical engineer, physicist, United States Marine Corps officer, and USAF/NASA astronaut. He was born in Lorain, Ohio, but considered Westlake, Ohio his hometown. Overmyer was selected by the United States Air Force as an astronaut for its Manned Orbiting Laboratory in 1966. Upon cancellation of this program in 1969, he became a NASA astronaut and served support crew duties for the Skylab program and Apollo-Soyuz Test Project. In 1976, he was assigned to the Space Shuttle program, and flew as pilot on STS-5 in 1982, and as commander on STS-51-B in 1985. He was selected as a lead investigator into the Space Shuttle Challenger disaster, and retired from NASA in 1986. Ten years later, Overmyer died in Duluth, Minnesota while testing the Cirrus VK-30 composite homebuilt aircraft.

Donald Herod Peterson was a United States Air Force officer and NASA astronaut. Peterson was originally selected for the Air Force Manned Orbiting Laboratory (MOL) program, but, when that was canceled, he became a NASA astronaut in September 1969. He was a mission specialist on STS-6 on board Challenger. During the mission Peterson performed a spacewalk to test the new airlock and space suits. He logged 120 hours in space. Peterson retired from NASA in 1984.

Richard Harrison Truly is a retired Vice Admiral in the United States Navy, a former fighter pilot, former astronaut for both the United States Air Force and NASA, and was the eighth Administrator of the National Aeronautics and Space Administration (NASA) from 1989 to 1992. He was the first former astronaut to head the space agency. After his departure from NASA, he led the Georgia Tech Research Institute from 1992 to 1997, and the National Renewable Energy Laboratory from 1997 to 2005.

Daniel Charles Brandenstein is the Executive Vice President and Chief Operating Officer of United Space Alliance. He is a former Naval Aviator, test pilot and NASA astronaut, who flew four Space Shuttle missions.

Michael Lloyd Coats is a former NASA astronaut (three spaceflights), raised in Riverside, California. From December 2005 to December 2012, he served as Director of the Johnson Space Center in Houston, Texas.

Richard Oswalt Covey is a retired United States Air Force officer and former NASA astronaut.

John Oliver Creighton is a former NASA astronaut who flew three Space Shuttle missions.

Robert Lee "Hoot" Gibson is a former American naval officer and aviator, test pilot, aeronautical engineer, and a retired NASA astronaut, as well as a professional pilot who currently races regularly at the annual Reno Air Races.

Frederick Drew Gregory is a former United States Air Force pilot, military engineer, test pilot, and NASA astronaut as well as former NASA Deputy Administrator. He also served briefly as NASA Acting Administrator in early 2005, covering the period between the departure of Sean O'Keefe and the swearing in of Michael Griffin.