Live coverage: Orion lands in Pacific

The 330-foot tall mobile service tower has been retracted from the Delta 4-Heavy rocket at Cape Canaveral’s pad 37B for tomorrow morning’s launch that will place the Orion spacecraft on its intended trajectory.

One of the largest satellites in the world will launch aboard America’s biggest operational booster Thursday, riding that power to a listening post 22,300 miles above the planet for its clandestine eavesdropping mission, all indications suggest.

An Antares rocket carrying the Cygnus cargo ship has exploded moments after lift off from Wallops Island, Virginia.