we have in the override closed position to see if it'll get better. it seems to be getting worse. >> which camera is that on? >> it's on camera 18. >> camera 18 you can see the man working on the hydrogen leak. >> once the technicians depart we will send hydrogen again through the system to assure that the leak has been corrected. the astronauts now coming up toward the pad, itself, as the crew of several technicians at the 200-foot level proceed to tighten some bolts around a leaking valve. the astronaut team which has just arrived at the pad, the transfer van now backing up toward the elevator in a matter of five minutes or so, we'll be ready for the spacecraft command. and neil armstrong to come across the sill at the 320-foot level. that is our status at two hours 43 minutes 47 seconds and counting. this is launch control.