WATCH LIVE: NASA Orion unmanned spacecraft re-enters Earth's atmosphere
Broadcast live streaming video on Ustream
By RYAN GORMAN
Watch live as NASA"s unmanned Orion spacecraft re-enters Earth's atmosphere.
The test flight orbited Earth twice as NASA tests systems on a spacecraft intended to take mankind to Mars as soon as 2030.
Friday's launch took place after being postponed from Thursday due to a valve problem.