NASA's Orion spacecraft is off loaded from the back of USS Anchorage at Naval Base San Diego, California, December 8, 2014. Orion splashed down in the Pacific Ocean approximately 600 miles southwest of San Diego after completing a two-orbit, 4.5 hour flight test that took it farther into space than any spacecraft built for humans has been in more than 40 years. REUTERS/Mike Blake (UNITED STATES - Tags: SCIENCE TECHNOLOGY SOCIETY TPX IMAGES OF THE DAY) 

NASA's Orion spacecraft is off loaded from the back of the USS Anchorage at Naval Base San Diego, California December 8, 2014. Orion splashed down in the Pacific Ocean approximately 600 miles southwest of San Diego after completing a two-orbit, 4.5 hour flight test that took it farther into space than any spacecraft built for humans has been in more than 40 years. REUTERS/Mike Blake (UNITED STATES - Tags: SCIENCE TECHNOLOGY SOCIETY) 

NASA's Orion spacecraft is off loaded from the USS Anchorage at Naval Base San Diego, California, December 8, 2014. Orion splashed down in the Pacific Ocean approximately 600 miles southwest of San Diego after completing a two-orbit, 4.5 hour flight test that took it farther into space than any spacecraft built for humans has been in more than 40 years. REUTERS/Mike Blake (UNITED STATES) 

The Delta IV Heavy rocket with the Orion spacecraft lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 5, 2014. 

The Delta IV Heavy rocket with the Orion spacecraft lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 5, 2014. 

The Delta IV Heavy rocket with the Orion spacecraft lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 5, 2014. 

A news photographer awaits the launch of The Delta IV Heavy rocket with the Orion spacecraft from the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. 

The Delta IV Heavy rocket carrying the Orion spacecraft sits on the launch pad awaiting liftoff in the sunrise at the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. 

The Mobile Service Tower rolls back from the Delta IV Heavy with the Orion spacecraft on launch pad 37B at Cape Canaveral Air Force Station in Cape Canaveral, Florida, December 4, 2014. 

The Orion capsule is moved at Kennedy Space Center in Florida November 11, 2014. 

Tourists take a selfie with the Delta IV Heavy rocket and the Orion spacecraft behind them at the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 1, 2014. 

A view of the United Launch Alliance Delta IV Heavy rocket at Cape Canaveral Air Force Station, Florida October 1, 2014. 

A test version of NASA's Orion capsule is towed towards the USS Anchorage during a recovery drill off the coast of California September 15, 2014. 

An Orion patch is seen on the shirt of a NASA employee on board the USS Anchorage during an Orion capsule recovery drill off the coast of California September 15, 2014. 

A test version of NASA's Orion capsule floats in the rear of the USS Anchorage during a recovery drill off the coast of California September 15, 2014. 

The Orion capsule sits on top of the service module as it is moved from the Operations & Checkout Building to the Payload Hazardous Servicing Facility (L) at Kennedy Space Center, Florida September 11, 2014. 

Parajumpers from the Air Force 920th rescue wing practice attach a flotation collar to a full-size mockup of NASA's crew module for the Orion Crew exploration vehicle during testing at the Cape Canaveral Air Force Station in Florida, April 8, 2009.