Christopher J. Cassidy was selected as an astronaut by NASA in 2004 and is a veteran of three space flights, STS‐127, Expedition 35, and Expedition 63. During STS‐127, Cassidy served as a Mission Specialist and was the 500th person in history to fly into space. This mission delivered the Japanese Experiment Module Exposed Facility (JEM‐EF) and the Experiment Logistics Module Exposed Section (ELM‐ES) to the station. For Expedition 35, Cassidy and the European Space Agency (ESA) astronaut Luca Parmitano had their unplanned spacewalk to replace a pump controller box cut short when Parmitano had cooling water leak into his helmet. Cassidy, a U.S. Navy SEAL, has been deployed twice to the Mediterranean and twice to Afghanistan. He has been the recipient of Bronze Star with combat ‘V’ and Presidential Unit Citation for leading a nine‐day operation at the Zharwar Kili Cave on the Afghanistan/Pakistan border. Cassidy recently served as Commander on the International Space Station for Expedition 63.