Atlas V launch scrubbed due to ground issue

Tonight's launch of the Atlas V carrying the SBIRS GEO-4 satellite has been scrubbed for the day due to a ground issue associated with the booster liquid oxygen system. The next launch attempt will occur tomorrow, January 19th, from SLC-41 at the Cape Canaveral Air Force Station. The weather forecast shows a 90% chance of favorable weather conditions. The Atlas V will lift off the launch pad at 7:48PM EST.