spaceflightnow.com
2241 GMT (6:41 p.m. EDT)
Mission Control in Houston has loaded Atlantis’ onboard computers with the proper guidance parameters based on the projected launch time.
2239 GMT (6:39 p.m. EDT)
The Main Propulsion System helium system is being reconfigured by pilot Lee Archambault. Soon the gaseous nitrogen purge to the aft skirts of the solid rocket boosters will be started.
Marilyn Monroe standing on the ventilation grate. Vent that!