From NASA: The countdown is continuing to go smoothly for the STS-134 mission and final flight of Endeavour. Liftoff remains on target for 3:47 p.m. EDT. Weather remains favorable, with a 70 percent chance of good conditions at launch time. As currently scheduled, only one more launch for the Space Shuttle program remains after today. KSC Countdown Portal STS-134 Page NASA TV Godspeed and clear skies.