Christopher Cassidy

Christopher John "Chris" Cassidy (born January 4, 1970, Salem, Massachusetts, United States) is a NASA astronaut and Navy SEAL. Chris Cassidy achieved the rank of Commander in the U.S. Navy. Cassidy 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 in Mathematics from the United States Naval Academy in 1993 and a Master's degree in ocean engineering from MIT in 2000. While in the Navy, Cassidy passed BUD/S and became a Navy SEAL. While a SEAL he served several tours of duty supporting the fight in the War on Terror. He resides in York, Maine with his wife, Julie Byrd, and their three children. His first spaceflight was on Space Shuttle mission STS-127, and his second was on Soyuz TMA-08M. He is currently (31 March 2013) in space as a flight engineer for Expedition 35/36. Cassidy has worked as a CAPCOM for both International Space Station and Space Shuttle missions in the past.

Military experience
Cassidy graduated from BUD/S Class 192. 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. He made four six-month deployments: two to Afghanistan, and two to the Mediterranean Sea. Cassidy served as Executive Officer and Operations Officer of Special Boat Team 20 in Norfolk, Virginia, and SEAL Platoon Commander at SEAL Team 3 in Coronado, California. He deployed to the Afghanistan region two weeks after the September 11 attacks. He served as Ground Assault Force Commander for international and U.S.-only combat missions in Afghanistan. Cassidy led two months of non-compliant ship-boardings in the Northern Persian Gulf. Cassidy was also a SEAL Delivery Vehicle (SDV) Platoon Commander at SEAL Delivery Vehicle Team Two in Norfolk. He accumulated over 200 hours underwater as Pilot / Navigator / Mission Commander of a two-man flooded submersible (SDV), which is launched and recovered from a host-ship submarine. He also served as Dry Deck Shelter Platoon Commander at SEAL Delivery Vehicle Team Two in Norfolk. Cassidy volunteered for and completed a week-long, 180-mile charity kayak paddle from Norfolk, Virginia to Washington, D.C. to raise money and awareness for the Special Operations Warrior Foundation.

NASA career
Cassidy was selected as an astronaut candidate by NASA in May 2004. In February 2006 he completed Astronaut Candidate Training, which included scientific and technical briefings, intensive instruction in Space Shuttle and International Space Station systems, physiological training, T-38 Talon flight training, and water and wilderness survival training. Completion of this initial training qualified him for various technical assignments within the Astronaut Office and future flight assignment as a mission specialist.

He was a Mission Specialist on STS-127, and performed a total of three spacewalks to help install and complete components of the Japanese Experiment Module.

Cassidy has been assigned to the Expedition 35 crew as a flight engineer and flew to the ISS aboard Soyuz TMA-08M (US designation: 34S), which launched on March 28, 2013. On May 11, 2013, Cassidy and Thomas Marshburn performed an unplanned spacewalk to replace a pump controller box suspected to be the source of an ammonia coolant leak. Cassidy participated in two US spacewalks from the ISS in June/July 2013.

Awards and honors
Cassidy is an honor graduate of Basic Underwater Demolition/SEAL training (BUD/S) Class 192. He was awarded the Bronze Star with "V" device and the Presidential Unit Citation for leading a 9-day operation at the Zhawar Kili cave complex – a national priority objective directly on the Afghan/Pakistan border during Operation Enduring Freedom. Cassidy was a guest speaker at the USNA Combat Leadership Seminar (2003 & 2004). He was awarded a second Bronze Star for combat leadership service in 2004 during Operation Enduring Freedom in Afghanistan.

Chris Cassidy is also the 500th person in space. He achieved this by being the designated crew member by the rest of his crew mates, during the STS-127 mission. He is also the second SEAL to fly in space following William Shepherd, a veteran of four prior missions.