On Oct. 26, International Space Station Expedition 25 Commander Doug Wheelock and Flight Engineers Shannon Walker and Scott Kelly paid tribute to the 25th anniversary of the flight of space shuttle Challenger's STS-61/D1 German Spacelab mission during an in-flight event for the European Space Agency. The event included dignitaries and officials gathered in Berlin. Challenger launched on Oct. 30, 1985, with a record size crew of eight on board for the scientific research mission.
