ISS037-E-028300 (8 Nov. 2013) --- Four of the nine crew members on the International Space Station work in the Unity node. Pictured at top is European Space Agency astronaut Luca Parmitano, Expedition 37 flight engineer. Pictured from bottom left are Japan Aerospace Exploration Agency astronaut Koichi Wakata, NASA astronauts Michael Hopkins and Rick Mastracchio, all Expedition 38 flight engineers.