On what date was XXX launched?
STS-135
During an address at the Marshall Space Flight Center on 16 November 2010, NASA administrator Charles Bolden said that the agency needed to fly STS-135 to the station in 2011, due to possible delays in the development of commercial rockets and spacecraft designed to transport cargo to the ISS. ``We are hoping to fly a third shuttle mission (in addition to STS-133 and STS-134) in June 2011, what everybody calls the launch-on-need mission...and that's really needed to (buy down) the risk for the development time for commercial cargo,'' Bolden said.