Forgotten Franklin letters offer glimpse into U.S. history

An American professor doing research in London stumbled across a series of previously unknown letters written by, to, and about Benjamin Franklin, a stunning find that sheds new light on early U.S. history.... "I swear, I just about shot through the ceiling I was so excited," he said. "It's like finding a treasure chest...." The letters cover Franklin's success in dealing with British Gen. Edward Braddock, who had been sent to Pennsylvania in 1755 to defeat the French at Fort Duquesne, in modern-day Pittsburgh.