Pictures: USS Monitor gun turret undergoes 3-D scan

The crew of the USS Monitor relaxes on the deck of the Civil War ironclad at James River, Virginia, in this undated photograph by James F. Gibson. A U.S. Navy salvage crew dove to the floor of the Atlantic off the coast of Cape Hatteras in June, to examine the remains of the famed Union warship which sank on New Year’s Eve 1862.