Delta IV Heavy NROL-71 Scrub Statement

The launch of a United Launch Alliance Delta IV Heavy carrying the NROL-71 mission for the National Reconnaissance Office was scrubbed today due to indications of elevated hydrogen concentrations within the port booster engine section.
 
The team is prepping for a 24-hour turn around on Thursday, Dec. 20, from Space Launch Complex-6 at Vandenberg Air Force Base. The forecast shows a 80 percent chance of favorable weather conditions for launch. The launch is planned for 5:31 p.m. PST.