STS-41G was Challenger's sixth flight and the 13th mission of NASA's Space Shuttle program. Launched from Kennedy Space Center's Launch Complex 39A on October 5, 1984, it became the Shuttle program's first seven-person mission and the first flight to carry two women, Sally Ride and Kathryn Sullivan. The crew deployed the Earth Radiation Budget Satellite, operated the OSTA-3 Earth-observation payload, carried the Canadian CANEX experiment package for Marc Garneau's first spaceflight, and flew other imaging and radiation-monitoring experiments. Sullivan and David Leestma also performed an EVA to demonstrate orbital-refueling hardware, making Sullivan the first American woman to walk in space. Challenger landed on Runway 33 at Kennedy's Shuttle Landing Facility on October 13, 1984, after 133 revolutions and a mission lasting just over eight days.