New T-zero time 7:17 EST

UPDATE ( 7:14 ) - Ground wind violation, Launch delayed.

UPDATE ( 7:46 ) - New T-ZERO time 7:55

UPDATE ( 7:53 ) - Launch on hold. Another wind violation.

UPDATE ( 8:15 ) - New T-ZERO time 8:26

UPDATE ( 8:23 ) - Launch on hold again.

UPDATE ( 8:28 ) - Left and center booster anomalies ( Valves sensors, showing not closed ). Quote from official NASA blog : "A fill and drain valve on the rocket did not function correctly. Standing by as rocket and spacecraft are safed."