Steven R. Nagel, American colonel, engineer, and astronaut (d. 2014)
Steven Ray Nagel (October 27, 1946 – August 21, 2014), (Col, USAF), was an American astronaut, aeronautical and mechanical engineer, test pilot, and a United States Air Force pilot. In total, he logged 723 hours in space. After NASA, he worked at the University of Missouri College of Engineering as an instructor in its Mechanical and Aerospace Engineering Department.