NASA Has Lots to Prove With This Morning's Orion Test Flight

NASA's Orion test flight is scheduled for this morning. The launch is a giant first step (you could say "a giant leap") toward an eventual mission to Mars.

NASA is hoping to launch an unmanned test flight of its Orion spacecraft today, though at the time of this writing it hasn't yet pushed the button:

#Orion is currently "no-go" due to a range issue. There's a boat in the launch area. Teams are working to remove the boat from the area.

— NASA (@NASA) December 4, 2014

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