Aerial View of Orion, Delta IV Heavy

This helicopter view of the NASA Causeway connecting NASA's Kennedy Space Center with Cape Canaveral Air Force Staton shows the thousands of vehicles parked where guests gather to see the launch of the Orion Exploration Flight Test-1 (EFT-1) on Dec. 4, 2014. The liftoff was postponed because of an issue related to fill and drain valves on the Delta IV Heavy rocket that teams could not troubleshoot by the time the launch window expired. Photo credit: NASA/Kim Shiflett

This helicopter view of the NASA Causeway connecting NASA's Kennedy Space Center with Cape Canaveral Air Force Staton shows the thousands of vehicles parked where guests gather to see the launch of the Orion Exploration Flight Test-1 (EFT-1) on Dec. 4, 2014. The liftoff was postponed because of an issue related to fill and drain valves on the Delta IV Heavy rocket that teams could not troubleshoot by the time the launch window expired. Part of Batch image transfer from Flickr.

Photographer NASA/Kim Shiflett