Space shuttle Endeavour's external tank is fully loaded with more than 500,000 gallons of liquid hydrogen and liquid oxygen in preparation for today's 8:56 a.m. EDT launch.
The countdown entered a planned 2.5-hour hold at T-3 hours, during which the tank will remain in "stable replenish" mode, the Close Out Crew will prepare the White Room for astronaut arrival, and the Final Inspection Team will conduct its inspections.
Forecasters continue to predict a 70 percent chance of favorable weather for today's launch.
Follow along with Endeavour's countdown milestones on NASA's Launch Blog at http://www.nasa.gov/mission_pages/shuttle/launch/launch_blog.html and on NASA TV at www.nasa.gov/ntv.
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