0521 GMT (1:21 a.m. EDT)
Shuttle Atlantis is being fueled up again for launch to the International Space Station. Loading of the external tank with 528,000 gallons of liquid oxygen and liquid hydrogen began around 1:15 a.m. for this second countdown attempt. Controllers will be carefully monitoring the engine cutoff sensors in the tank as fueling proceeds. As long as the three hydrogen sensors that worked normally yesterday remain good today, NASA will meet its rules governing the hardware and expect to press forward with 3-of-4 sensors for liftoff at 11:15 a.m.
The weather outlook remains favorable with an 80 percent chance of acceptable conditions. There are no other technical issues being worked by the team.
spaceflightnow.com
1425 GMT (10:25 a.m. EDT)
The International Space Station is orbiting 220 miles above Earth. Right now, the outpost is flying south of Australia. At launch, it will be over the North Atlantic. Liftoff is timed to place Atlantis on course to dock with the station Monday at 6:45 a.m.
1420 GMT (10:20 a.m. EDT)
T-minus 9 minutes and holding. Countdown clocks have gone into the planned 45-minute, 55-second built-in hold. Today's launch remains set for 11:14:55 a.m. EDT.