NASA's Commercial Crew Program is facilitating the development of privately operated crew transportation systems to low-Earth orbit. It is currently funding development of systems from Boeing, SpaceX, and Sierra Nevada Corporation through various agreements. The long term goal is to certify a commercial crew transportation capability by 2017 to provide safe transportation of NASA crew to the International Space Station, enabling the purchase of commercial crew services. NASA received proposals in January 2014 for the Commercial Crew Transportation Capability contract, which will fund development through certification, with an award expected in August 2014.