The Delta IV Heavy
The Delta IV Heavy In early 2014, the Orion MPCV will be sent on Exploration Test Flight 1, a shakedown cruise to test the capsule's capabilities. Because the SLS is still under construction, Lockheed Martin has selected a Delta IV Heavy to use for the test. In this photo, a Delta IV Heavy stands ready to launch NROL-26, a classified U.S. satellite. United Launch Alliance

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