Endeavour lifts off.
It had to be disconnected at the elbow and was supported by a massive rig for pre-flight testing. NASA has planned two spacewalks, Sunday and Tuesday, for Canadian astronaut Chris Hadfield and U.S. astronaut Scott Parazynski to install the arm. We're actually going to run it through its initial paces during our flight. Time for a third spacewalk was built into the mission schedule in case astronauts need more time to complete the intricate work. Endeavour also will deliver an Italian-built cargo carrier filled with 10,000 pounds of gear.