Endeavour landed in Houston while riding piggyback atop a modified Boeing 747 jumbo jet to end the first leg of its three-day journey to Los Angeles, where the retired space shuttle will ultimately be transformed into a museum exhibit at the California Science Center.
'I'm happy to be done,' Williams said from the International Space Station Sunday after she crossed the orbital finish line. 'It wasn't easy, and I'm sure everybody in California's very happy to be done too.'
Williams first launched into space in 2007 and spent 195 consecutive days in space, setting a record for the longest single spaceflight by a female astronaut. On Wednesday, she'll celebrate her birthday in space.