Think you know everything about Washington? Think again. During the Revolutionary War, General George Washington (AKA "Agent 711") was the leader of a ring of spies The group--called the Culper Ring--used secret names, codes, invisible ink, and more to spy on the British and pass along information. Nobody knew about it at the time (and few do so today), but those sneaky heroes risked their lives to help win the American Revolution Illustrated throughout...