Discovery’s external tank has been loaded with about 500,000 gallons of liquid hydrogen and liquid oxygen during a flawless fueling process. The launch of shuttle is on schedule for 1:36 a.m. EDT Tuesday morning. Forecasters predict an 80 percent chance of acceptable conditions at launch time. Discovery is headed to the International Space Station on this mission to add new hardware and experiment racks for the inside of the orbiting laboratory complex.
