In this June 27, 2013 photo provided by NASA, Sierra Nevada Corp. engineers and technicians prepare the Dream Chaser engineering test vehicle for tow tests at NASA's Dryden Flight Research Center in California. On Thursday, January 14, 2016, NASA announced the Sierra Nevada Corp. will join SpaceX and Orbital ATK in launching cargo to the International Space Station. These flights, yet to be finalized, will run through 2024. (Photo by Ken Ulbrich/NASA via AP Photo)
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