Countdown Clock on for Shuttle Endeavour's Launch

NASA has begun counting down toward the planned predawn launch of the space shuttle Endeavour on Sunday. Endeavour is poised to blast off from the Kennedy Space Center in Florida on Sunday morning at 4:39 a.m. EST to deliver a brand-new room and observation portal to the International Space Station. The clocks began ticking down toward launch time early this morning. "We're right on schedule, where we're supposed to be," said NASA test director Jeff Spaulding during a Thursday status briefing. More

(Source: Fox News - Feb 5)