William Frederick Fisher is an American physician and a former NASA astronaut. Fisher went into space in 1985 on board the Space Shuttle. He retired from NASA in 1992 and returned to the full-time practice of medicine. His time at NASA coincided with that of his former wife and fellow astronaut Anna Lee Fisher.

David Cornell Leestma is a former American astronaut and retired Captain in the United States Navy.

ohn Michael "Mike" Lounge was an American engineer, a United States Navy officer, a Vietnam War veteran, and a NASA astronaut. A veteran of three Space Shuttle flights, Lounge logged over 482 hours in space. He was a mission specialist on STS-51-I (1985) and STS-26 (1988) and was the flight engineer on STS-35 (1990).

Jerry Lynn Ross is a retired United States Air Force officer and a former NASA astronaut. He is a veteran of seven Space Shuttle missions, making him the joint record holder for most spaceflights (a record he shares with Franklin Chang-Diaz). His papers, photographs and many personal items are in the Barron Hilton Flight and Space Exploration Archives at Purdue University. He was inducted into the Astronaut Hall of Fame during ceremonies in May 2014. Ross is the author of Spacewalker: My Journey in Space and Faith as NASA's Record-Setting Frequent Flyer (Purdue University Press, 2013) with John Norberg. In March 2014 it was announced "Spacewalker" will be available in a French translation through the specialist aerospace publisher Altipresse. Fellow astronaut Chris Hadfield describes Ross in his autobiography, An Astronaut's Guide to Life on Earth, as "the embodiment of the trustworthy, loyal, courteous and brave astronaut archetype."

Sherwood Clark "Woody" Spring is a retired United States Army colonel and former NASA astronaut. Spring is married with two children. He is the father of United States Olympian Justin Spring. Sherwood Spring has logged 165 hours in space, 12 of which were spent conducting spacewalks. Spring has also accumulated 3,500 hours in 25 different military and civilian aircraft; over 1,500 of those hours were spent in jet aircraft.

Robert Clyde "Bob" Springer is a retired American astronaut and test pilot who flew as a Mission Specialist on two NASA Space Shuttle missions in 1989 and 1990. A decorated aviator in the United States Marine Corps, Springer also flew more than 500 combat sorties during the Vietnam War. He has logged over 237 hours in space and 4,500 hours flying time, including 3,500 hours in jet aircraft.

Kenneth Donald is a retired American naval aviator, test pilot, engineer, U.S. Marine Corps officer, and NASA astronaut.

John Howard Casper is an American astronaut and United States Air Force pilot.

Frank Lee Culbertson Jr. is an American former naval officer and aviator, test pilot, aerospace engineer, and NASA astronaut. He served as the Commander of the International Space Station for almost four months in 2001 and was the only American not on Earth when the September 11 attacks occurred. He is currently President of the Space Systems Group at Northrop Grumman Innovation Systems. Mr. Culbertson is responsible for the execution, business development and financial performance of the company’s human spaceflight, science, commercial communications, and national security satellite activities, as well as technical services to various government customers. These include some of Northrop Grumman's largest and most important programs such as NASA’s Commercial Resupply Services (CRS) initiatives to the International Space Station (ISS) as well as various national security-related programs.

Sidney McNeill Gutierrez is a former NASA astronaut.

Michael James "Mike" McCulley is a retired American naval officer and aviator, test pilot, metallurgical engineer, former NASA astronaut, and was the first submariner in space.

James Donald "Wxb" Wetherbee is an American former naval officer and aviator, test pilot, aerospace engineer, and NASA astronaut. He is a veteran of six Space Shuttle missions and is the only American to have commanded five spaceflight missions.