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JOHNSON SPACE CENTER, HOUSTON, TX -- (JSC STS111-5-002) -- These four astronauts are the prime crew for NASA's STS-111 mission. Astronaut Kenneth D. Cockrell (front right) is mission commander, and astronaut Paul S. Lockhart (front left) is pilot. Astronauts Philippe Perrin (rear left), representing the French Space Agency, and Franklin R. Chang-Diaz are mission specialists, assigned to extravehicular activity (EVA) work on the International Space Station (ISS). Additionally, this crew will drop off the Expedition Five crew members at the orbital outpost, and it will bring back the Expedition Four trio at mission's end