About Christopher Cassidy
Christopher John Cassidy (born January 4, 1970) is an American retired NASA astronaut and United States Navy SEAL. He achieved the rank of captain in the U.S. Navy. His first spaceflight was on a Space Shuttle mission in 2009. He was the Chief of the Astronaut Office at NASA from July 2015 until June 2017. == Early life and education == Cassidy was born in Salem, Massachusetts on January 4, 1970. He attended York High School, in York, Maine. He then graduated from the Naval Academy Preparatory School in Newport, Rhode Island in 1989. He received a Bachelor of Science degree in mathematics from the United States Naval Academy in 1993 and a Master of Science degree in ocean engineering at the Massachusetts Institute of Technology in 2000. == Military career == Cassidy graduated from BUD/S class 192 in 1993 as Honor man. He served for ten years as a member of the Navy SEALs. His specializations in military tactics include long range special reconnaissance (vehicular and foot patrols), direct action building assaults, non-compliant ship-boardings, desert reconnaissance patrols, combat diving, underwater explosives, and a variety of air operations, including parachuting, fast roping, and rappelling.
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