NASA: Good shot at Sunday shuttle launch

CAPE CANAVERAL, Fla. (AP) -- NASA feels it has a good shot at sending shuttle Discovery to the international space station on Sunday following repairs out at the launch pad.
   A half-dozen or so workers were out at the Florida launch pad Friday, putting in a new hydrogen vent line hookup and fresh seals.
   NASA called off Wednesday's launch attempt after hydrogen gas leaked into the air at the spot where a hydrogen gas vent line hooks up to Discovery's external fuel tank.
   It was the latest delay for the mission to deliver a final set of solar wings to the space station. The earlier postponements were caused by different shuttle valves and pushed the flight back by a month.
   Forecasters expect an 80 percent chance of good weather for the evening launch.