Astronaut Daniel W. Bursch, Expedition Four flight engineer, works on the Elektron Oxygen Generator in the Zvezda Service Module on the International Space Station (ISS). Born July 25, 1957, in Bristol, Pennsylvania, but considers Vestal, New York, to be his hometown. Received a bachelor of science degree in physics from the United States Naval Academy in 1979, and a master of science degree in engineering science from the Naval Postgraduate School in 1991. Dan Bursch and fellow astronaut Carl Walz currently hold the U.S. space flight endurance record of 196 days in space.
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