Space ShuttleSpace Shuttle Discovery lifts off on the 120th shuttle flight, a 15-day mission to deliver a new module to the International Space Station. The module in question is the Harmony node, which adds space for further modules to be added by future shuttle missions. Aboard Discovery for her 34th mission are Commander Pamela Melroy, Pilot George Zamka, mission specialists Douglas Wheelock, Scott Parazynski, Stephanie Wilson and Paolo Nespoli, and ISS Expedition 16 crewmember Daniel Tani, who remains on the station. Among the items stowed away aboard the shuttle are the screen-used lightsaber prop wielded by Luke Skywalker in Return Of The Jedi.