CAPE CANAVERAL, Fla. – The United Launch Alliance has scrubbed its launch of the Atlas V rocket Wednesday afternoon after a ground system valve problem. If you are just joining us, a ground system valve problem interrupted the countdown to today's #AtlasV rocket launch. The agency said the rocket had to undergo some repairs after the launch was delayed. It was rolled back out on the launch pad in Cape Canaveral on Tuesday. The launch was supposed to take place seven miles from the visitor complex from the Cape Canaveral Air Force Station Space Launch Complex 41 in Florida and set to launch just before 5 p.m.