Video: Vice President Al Gore attends DSCOVR launch

A problem with a U.S. Air Force tracking radar kept a Falcon 9 rocket crowned with a NOAA space weather observatory grounded Sunday, forcing a long-delayed mission to stay on Earth an extra day.

The SpaceX Falcon 9 launch countdown with the Deep Space Climate Observatory is halted due to a problem at T-minus 2 minutes, 26 seconds.

A novel NOAA climate observatory with a unique past arrived at Cape Canaveral to begin two months of launch preparations, testing, and fueling before liftoff aboard a SpaceX Falcon 9 rocket.