Pumps at Launch Pad 39A are filling space shuttle Discovery’s external tank with liquid hydrogen and liquid oxygen this afternoon as the launch team works toward a liftoff at 1:10 a.m. EDT Wednesday morning. The orange tank will be loaded with about 500,000 gallons of propellants that will power Discovery’s three main engines during the flight into orbit. The weather outlook calls for a 70 percent chance of acceptable conditions at launch time. Poor weather scrubbed Tuesday morning’s launch try. Discovery is heading to the International Space Station with a cargo module loaded with equipment, experiments and supplies for the crew of the orbiting laboratory.
