NASA astronaut and U.S. Army Aviator with over 3,400 hours of flying time and 12 hours of spacewalk time. He has flown aboard the Discovery, Endeavour, and Atlantis.
He was a First Class Scout in the Boy Scouts of America.
He was diagnosed with Parkinson's Disease in 1994 and was the subject of a documentary detailing his struggle with the disease.
His first son, Richard, was born in March 1980.
He flew aboard the space shuttle Discovery like fellow astronaut Ellison Onizuka, who was later killed in the ill-fated Challenger mission.