Flight controllers waved off STS-113's first landing opportunity of the day at Kennedy Space Center, Fla., due to low cloud ceilings and rain.Flight controllers waved off STS-113's first landing opportunity of the day at Kennedy Space Center, Fla., due to low cloud ceilings and rain. Now, they turn their attention to today's second and final opportunity, which begins with a deorbit burn at 1:27 p.m. CST (1931 GMT) and culminates with a 2:33 p.m. CST (2033 GMT) landing.

If Endeavour is unable to come home today, four opportunities are available Saturday -- two in Florida and two at Edwards Air Force Base, Calif.