Live: Launch crews fueling Atlantis tank

Atlantis is being fueled for flight.

After two days of meetings to review the fuel sensor issues, mission managers met briefly this morning and gave the go for tanking. About 40 minutes from now is when the first test of the engine cutoff sensors will take place. If any of the four sensors in the liquid hydrogen tank act up during today's count, NASA already has decided to scrub the launch.

Commander Steve Frick and his six crewmates awoke at 5 a.m. and they are getting ready for a long day on Earth and, they hope, in orbit.

So far, no other technical issues have emerged overnight. Liftoff is scheduled for 3:21 p.m. The weather forecast continues to call for a 80 percent chance of acceptable conditions. The chance of good weather is 70 percent on Monday and Tuesday.

Atlantis is launching on a mission to take the European Space Agency's Columbus science laboratory module to the International Space Station. Atlantis would dock at the station two days after launch and the 10 crew members on the two spaceships will work to install Columbus.

The mission preview story from Thursday's newspaper is online here. This morning's newspaper roundup on the work to turn around since the fuel sensor scrub of the first attempt is here.

Here's a timeline of some of the big events in today's countdown:

6:41 a.m.: Engine cutoff sensors' first test

8:55 a.m.: Close-out crew goes to launch pad

11:31 p.m.: Crew heads for launch pad

1:16 p.m.: Crew aboard, hatches closed for launch

3:21 p.m.: Scheduled launch target

Stay with us for live coverage throughout the day, including images and video feeds from Launch Complex 39. If you want to see stories, videos, graphics and more on this mission or sign up for text message alerts today, click here.