Michael Douglas Griffin is an American physicist and aerospace engineer who served as the Under Secretary of Defense for Research and Engineering from 2018 to 2020. He previously served as Deputy of Technology for the Strategic Defense Initiative, and as Administrator of NASA from April 13, 2005, to January 20, 2009. As NASA Administrator Griffin oversaw such areas as private spaceflight, future human spaceflight to Mars, and the fate of the Hubble telescope.

Commercial Orbital Transportation Services (COTS) was a NASA program to coordinate the development of vehicles for the delivery of crew and cargo to the International Space Station by private companies. The program was announced on January 18, 2006 and successfully flew all cargo demonstration flights by September 2013, when the program ended.