Felix Baumgartner of Austria sits in his capsule during the preparations for the final manned flight of the Red Bull Stratos mission in Roswell, New Mexico, on Oct. 6.
That is Baumgartner will have to travel at more than 700 miles per hour with the help of an engine.
It's a risky attempt that All Things Considered's Audie Cornish spoke to Baumgartner about back in May.
Audie asked him if there were any concerns about a human body travelling at this speed.
"Well, mostly, the scientists, they think you cannot maintain your normal freefall position, so it would start flat-spinning," he said. "And if that occurs and it's faster than 150 RPM, there's only one way for your blood to leave your body, and that's through your eyeballs."
Baumgartner and his team are live streaming the jump. We've embedded live video at the bottom of this post. Baumgatner is supposed to step out the capsule at 1:40 p.m. ET.
Copyright 2012 National Public Radio. To see more, visit http://www.npr.org/.
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