53 years old (Born on July 28, 1970)
After ascending to the rank of Colonel in the United States Air Force, this military test pilot worked for the National Aeronautics and Space Administration (NASA) as a Mission Specialist for the March, 2008 STS-123 flight of the Space Shuttle Endeavour. He also participated in a later Endeavour mission, STS-130.
Robert Behnken's Best Moments
