Video: X-37B payload mated to Atlas 5

The United Launch Alliance Delta 4 rocket, standing 206 feet tall and and weighing 720,000 pounds, unleashes 1.1 million pounds of thrust from its main engine and two side-mounted boosters at 12:52 a.m. EDT (0452 today to launch the GSSAP No. 3 and No. 4 satellites for the Geosynchronous Space Situational Awareness Program from Cape Canaveral.

For the second day running, bad weather at Cape Canaveral forced the postponement of the NROL-52 satellite launch. Today, the weather officer stopped the countdown with 97 seconds left.

The launch of a new U.S. weather satellite from Vandenberg Air Force Base in California has been delayed at least four days to Nov. 14, allowing time for technicians to remove and replace a faulty battery on the payload’s Delta 2 rocket, United Launch Alliance said Monday.