Space shuttle launch scrubbed

NASA has called off the scheduled launch of the space shuttle Discovery because of a broken valve during fueling today.

The planned 1:10 a.m. liftoff of the space shuttle and seven astronauts was called off just before 6 p.m. while teams were loading supercold propellants into the external tank.

NASA is still trying to understand why the valve was stuck. The engineering work will continue into the evening. NASA has not decided whether to try again tomorrow. That decision should come later this evening.

Discovery and seven astronauts were to launch on a mission to deliver supplies and a new crew member to the International Space Station.

We'll have a full report on the scrub later this evening once we get a handle on the technical details and impact.