Video: X-37B payload mated to Atlas 5

Air Force meteorologists are expecting good weather to launch the Delta 4 rocket with a military communications satellite when the sun goes down Friday evening at Cape Canaveral.

A roster of representatives from the commercial space industry, astronauts, retired military officers and politicians will advise the National Space Council as the top-level government panel seeks to reshape U.S. space policy, regulations and exploration strategies.

The 330-foot tall mobile service tower is rolled away from the United Launch Alliance Delta 4 rocket at Cape Canaveral’s pad 37B in the hours before the scheduled liftoff on Aug. 19.