Astronaut Chris Cassidy on a space walk outside the International Space Station in May 2013.
Christopher J. Cassidy was selected as an astronaut by NASA in 2004 and is a veteran of two space flights, STS‐127 and Expedition 35. 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.