The first stage of the SpaceX Falcon 9 rocket arrives at Launch Complex-40 at Cape Canaveral Air Force Station.

The first stage of the SpaceX Falcon 9 rocket arrives at Launch Complex-40 at Cape Canaveral Air Force Station in Florida. Once assembled, it will be a two-stage fully integrated launch vehicle, consisting of a first stage powered by nine SpaceX-developed Merlin 1C engines, a second stage, an interstage, an unpressurized trunk and the Dragon spacecraft qualification unit.

SpaceX was awarded procurement for three demonstration flights under the Commercial Orbital Transportation Services, or COTS, program managed by NASA's Johnson Space Center in Houston. A subsequent contract for Commercial Resupply Services, or CRS, was awarded in late 2008 to resupply the International Space Station. The SpaceX CRS contract provides for 12 missions to resupply the station from 2011 through 2015. Photo credit: NASA/Troy Cryder