Mission STS-118 - Flight Day 11

2007-08-18 - Flight Day 11 - Astronauts Charlie Hobaugh (left), STS-118 pilot; Tracy Caldwell and Canadian Space Agency's Dave Williams, both mission specialists, work on the middeck as the crew makes preparations for their return home. Hatches were closed between the International Space Station and Space Shuttle Endeavour at 4:10 p.m. on Aug. 18. (Credit: NASA)