Fueling of space shuttle Atlantis’s external fuel tank with more than 500,000 gallons of liquid hydrogen and liquid oxygen began on time at NASA Kennedy Space Center’s Launch Pad 39A at 2:01 a.m. EDT. The launch team will closely monitor the weather throughout the process. Weather remains at a 30 percent chance of favorable weather for liftoff at 11:26 a.m. Teams are not working any issues that would delay the launch.