The man who first discovered the Titanic wreckage says tourists visiting the site are destroying the remains of the ship's hull."They are loving the Titanic to death," oceanographer Robert Ballard said during an interview with Stephen Colbert.Ballard is using the 100th anniversary of the ship's sinking to bring attention to what he says is the unnecessary destruction of the historic site. "They are landing on it, crushing the deck, knocked off the crow's nest, leaving all sorts of garbage," he said. Ballard said one couple was even married in a submarine that landed on the Titanic's deck, which he called, "a little over-the-top." "What we're trying to do is say, look, visit the Titanic. But you don't go to Gettysburg with a shovel. You don't take belt buckles off the Arizona. So, visit, but don't touch," he said. On Monday, Ballard will host Save the Titanic on the National Geographic Channel. Along...