COLUMBUS, Ohio -- One of the greatest mysteries of our time is no longer a mystery, NBC 4's Colleen Marshall reported. After 31 years of silence, FBI veteran Mark Felt, 91, who sparked the Watergate scandal, revealed Tuesday he was Deep Throat. Felt secretly gave information to famed reporters Bob Woodward and Carl Bernstein about the break-in at the Democratic Headquarters in the Watergate Hotel. High-ranking officials in the Nixon Administration suspected Felt but apparently did not pursue it, fearing more damaging information might be revealed, Marshall reported. "He's always lived with honor. He's a great patriot," said Felt's daughter...