Tank Separates News Today

With you go through the maximum aerodynamic pressure? the elegant on the chest? >> one word is "acceleration." its amazing. youre on your back, like a big hydraulic press just hits you on the back and it never stops going. it keeps pushing and pushing, and 8 1/2 minutes you get that kind of acceleration. >> reporter: brooke, the next major milestone comes at 8:30, when the giant orange tank separates. at that point youre in space. youre free-floating, in space, youre done. >> whats the moment of...