Joe Frank Edwards Jr., , is an American aerospace engineer,former naval officer, aviator, test pilot and NASA astronaut.
Jeffrey Shears Ashby is an American mechanical engineer, and former naval officer and aviator, test pilot and NASA astronaut, a veteran of three Space Shuttle missions. He is a retired Captain in the U.S. Navy. He currently works for Blue Origin as chief of mission assurance.
Dominic Lee Pudwill Gorie is a retired United States Navy officer and NASA astronaut. He is a veteran of four Space Shuttle missions.
Frederick Hamilton "Rick" Hauck is a retired captain in the United States Navy, a former fighter pilot and NASA astronaut. He piloted Space Shuttle mission STS-7 and commanded STS-51-A and STS-26.
Donald Edward Williams was an American naval officer and aviator, test pilot, mechanical engineer and NASA astronaut. He logged a total of 287 hours and 35 minutes in space.
Robert Lee "Hoot" Gibson, , is a former American naval officer and aviator, test pilot, and aeronautical engineer. A retired NASA astronaut, he also served as Chief of the Astronaut Office from 1992 to 1994. Today Gibson is active as a professional pilot, racing regularly at the annual Reno Air Races. He was inducted into the U.S. Astronaut Hall of Fame in 2003 and the National Aviation Hall of Fame in 2013, and has received several military decorations throughout his career.
Stanley David Griggs was a United States Navy officer and a NASA astronaut. He is credited with conducting the first unscheduled extra-vehicular activity of the space program during Space Shuttle mission STS-51-D. Griggs was killed when the vintage World War II-era training aircraft he was piloting – a North American AT-6D – crashed near Earle, Arkansas.
David Mathieson Walker, , was an American naval officer and aviator, fighter pilot, test pilot, and a former NASA astronaut. He flew aboard four Space Shuttle missions in the 1980s and 1990s.
Kenneth Donald Cameron, , is a retired American naval aviator, test pilot, engineer, U.S. Marine Corps officer, and NASA astronaut.
Charles Owen Hobaugh is a former NASA astronaut and a retired U.S. Marine Corps officer. He has had three spaceflights, all of which were Space Shuttle missions to the International Space Station, lasting between 10 and 13 days.
Carlos Ismael Noriega is a Peruvian-American NASA employee, a former NASA astronaut and a retired U.S. Marine Corps lieutenant colonel.
Stephen Scot Oswald is an American former pilot and NASA astronaut.
Frederick Wilford "Rick" Sturckow is an engineer, retired United States Marine Corps officer, former NASA astronaut, and commercial spacecraft pilot. Sturckow is a veteran of four Space Shuttle missions. He flew on STS-88 and STS-105 as a pilot and STS-117 and STS-128 as a commander. All four missions docked with the International Space Station, making Sturckow one of three American astronauts to visit the station four times. Sturckow later was assigned to the Johnson Space Center as a CAPCOM. He left NASA in 2013 to become a pilot for Virgin Galactic.
Kenneth Todd "Hock" Ham is a retired American astronaut and a captain in the United States Navy. Ham was selected for NASA's astronaut program in August 1998, while serving as the F/A-18E/F Super Hornet lead carrier suitability test pilot. Ham's aviator call sign is "Hock". Ham traveled to space twice as part of the Space Shuttle program. He flew on STS-124 as pilot and then on STS-132 as mission commander.
Eric Allen Boe is a retired United States Air Force fighter pilot, Colonel, test pilot, and a current, active NASA astronaut. He flew as the pilot of Space Shuttle missions STS-126 and STS-133.
Michael James Foreman is a retired U.S. Navy pilot and a NASA astronaut. While with NASA, Foreman was part of a mission that delivered the Japanese Experiment Module and the Canadian Special Purpose Dexterous Manipulator to the International Space Station. Foreman was also a crewmember of the STS-129 mission in November 2009. In 2018, he was elected mayor of Friendswood, Texas; he was re-elected to a second 3-year term in 2021.
George David "Zambo" Zamka is a former NASA astronaut and United States Marine Corps pilot with over 3500 flight hours in more than 30 different aircraft. Zamka piloted the Space Shuttle Discovery in its October 2007 mission to the International Space Station and served as the commander of mission STS-130 in February 2010.
Christopher Joseph "Gus" Loria is a retired United States Marine Corps Colonel and a medically retired NASA astronaut. He was originally scheduled to fly on STS-113 as pilot; however, he was grounded from spaceflight due to a severe back injury.
Barry Eugene "Butch" Wilmore is a NASA astronaut and United States Navy test pilot. He has had two spaceflights, the first of which was an 11-day Space Shuttle mission in November 2009, to the International Space Station. Wilmore was designated as pilot with five other crew members on Space Shuttle Atlantis for the mission STS-129. He most recently served as part of Expedition 41 to the International Space Station.
Douglas Gerald Hurley is an American engineer, former Marine Corps pilot and former NASA astronaut. He piloted Space Shuttle missions STS-127 and STS-135, the final flight of the Space Shuttle program. He launched into space for the third time as commander of Crew Dragon Demo-2, the first crewed spaceflight from American soil since STS-135 and became, together with Bob Behnken, the first astronaut in history launching aboard a commercial orbital spacecraft. He was also the first Marine to fly the F/A-18 E/F Super Hornet. His call sign is "Chunky", and he was sometimes referred to by this name on the communication loops.
