Delta 4 rocket awaits launch on NROL-25

Take a tour around the remarkable Space Launch Complex 6, originally built for the Manned Orbiting Laboratory, redone for military space shuttle missions and now home to the United Launch Alliance Delta 4 rocket. The 21-story booster stands within the protective confines of its mobile gantry awaiting the countdown to the NROL-25 mission for the National Reconnaissance Office.

See our Mission Status Center for the latest news on the launch.

Photo credit: Justin Ray/Spaceflight Now