the oxygen so he can breathe but control the pressure so he doesn't go through decompression. bill: so long as all the tools hold up at that altitude and that amount of force too. you say on one level this is the ultimate, because i can. there were numerous firs on this. what are they. >> it's an incredible daredevil stunt. it's the highest man balloon jump, highest person without a spacecraft to break the sound barrier. he's chuck yaegar without an airplane. this is tpurbing what the human body can understand. bill: do you think he can pull it off? >> i think he can. he did an 18-mile space jump. he's got basically the pwefrs the air force and nasa on board and red bull. bill: and a lot of cameras on this. we'll watch and see how it all unfolds. thank you, corey. corey powell.