Shuttle leak repairs good, launch on for Wednesday

After a two-day delay, NASA's countdown clocks began ticking Sunday toward the final launch of space shuttle Discovery.

A pair of gas leaks resulted in back-to-back launch postponements for Discovery. NASA test director Steve Payne said repairs took care of the problem and enabled the launch team to aim for a Wednesday liftoff. Discovery is making its last trip to orbit. Its destination is the International Space Station. (AP)