The space shuttle Endeavour lifted off on its last mission Monday morning, NASA said.
The shuttle's mission is commanded by Mark Kelly. His wife, U.S. Rep. Gabrielle Giffords, D-Arizona, arrived safely at the Kennedy Space Center Sunday, NASA said, four months after being shot in the head during an assassination attempt at a public event in Tucson, Arizona.
After initial treatment in Arizona, Giffords has been undergoing rehabilitation at the TIRR Memorial Hermann center in Houston.
Photos of the shuttle and NASA's launch countdown clock were posted on her Facebook page Monday morning.
Giffords, along with President Barack Obama, was in Florida on April 29, when Endeavour was originally slated to launch. That liftoff was scrubbed because of a problem with a heater aboard the shuttle.