Roy Dubard Bridges Jr. is an American pilot, engineer, retired United States Air Force officer, test...

Guy Spence Gardner is a United States Air Force officer and a former astronaut. He holds the rank of...

Ronald John Grabe is a former NASA astronaut. He has earned the Air Force Distinguished Flying Cr...

Bryan Daniel O'Connor is a retired United States Marine Corps Colonel and former NASA astronaut....

Richard Noel "Dick" Richards is a retired American naval officer and aviator, test pilot, chemical e...

Michael John Smith was an American astronaut—pilot of the Space Shuttle Challenger when it was destr...

James Philip Bagian, MD, PE is an American physician, engineer, and former NASA astronaut of Armenia...

Franklin Ramón Chang Díaz is a Costa Rican Chinese American mechanical engineer, physicist, former N...

Mary Louise Cleave was an American engineer and NASA astronaut. She also served from 2004 to 2007 as...

Bonnie Jeanne Dunbar is a former NASA astronaut. She retired from NASA in September 2005 then served...