"NASA managers will hold a prelaunch news conference no earlier than 3 p.m. EDT on Saturday, March 14, to discuss the status of space shuttle Discovery's mission to the International Space Station. The briefing will air live on NASA Television and the agency Web site. Launch is scheduled for 7:43 p.m. on Sunday. Saturday's news conference will follow the conclusion of a NASA mission management team meeting that starts at 1 p.m."
"Repairs are under way on the Ground Umbilical Carrier Plate (GUCP) interface, where gaseous hydrogen leaked during Wednesday's launch attempt."