A Delta II rocket orbited a Soil Moisture Active Passive satellite in January 2015. In March 2015, an Atlas V rocket carried NASA's Magnetospheric Multiscale Mission spacecraft, and a Delta IV rocket orbited the GPS IIF-9 satellite on behalf of the U.S. Air Force. The U.S. Air Force's X-37B spaceplane was carried by an Atlas V rocket in May 2015, and a Delta IV orbited the WGS-7 satellite in July 2015. The fourth MUOS satellite was orbited by an Atlas V in September 2015. ULA's 100th consecutive successful liftoff was completed on 2 October 2015, when an Atlas V rocket orbited a Mexican Satellite System communications satellite on behalf of the Secretariat of Communications and Transportation. The classified NROL-55 satellite was launched by an Atlas V rocket several days later. Atlas V rockets launched GPS Block IIF satellites and the "Cygnus" cargo spacecraft in November 2015 and December 2015, respectively.