American Spies, Then And Now (SLIDESHOW)

Walter Ken Myers and his wife Gwendolyn Steingraber Myers have just been accused of spying on the U.S. for nearly thirty years for Castro's Cuba. While a headline-grabbing revelation, they're hardly the first to slip American secrets abroad. From the Rosenbergs to Robert Hanssen, here's a slideshow of some of the best known turncoats in U.S. history:

• • • • • • • • The original turncoat, Benedict Arnold spied on colonial forces for the British during the Revolutionary War. While a general in the Continental Army, Arnold was heralded for military successes like the capture of Fort Ticonderoga. However, in 1779, having been passed over for promotion and in debt, he switched sides. He was discovered when his plot to give West Point to the British was foiled and his co-conspirator was captured by the Americans. The British army then made him a brigadier general.