Rick Mastracchio, Expedition 39 flight engineer, signs a wall in the Quest airlock of the Earth-orbiting International Space Station after mounting his crew patch.
ISS039-E-020704 (13 May 2014) — NASA astronaut Rick Mastracchio, Expedition 39 flight engineer, signs a wall in the Quest airlock of the Earth-orbiting International Space Station after mounting his crew patch, continuing a Quest-based tradition of station crew members who have participated in space walks on their respective flights. A short time later, Mastracchio joined Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency and Flight Engineer Mikhail Tyurin of Roscosmos as they departed the orbital outpost in a Soyuz vehicle.