Larry Grathwohl
Larry David Grathwohl (October 13, 1947 – July 18, 2013) was a United States Army veteran and an FBI informant in the 1970s. He is best known as the informant who infiltrated the Weather Underground, a radical political organization in the United States. His exploits were documented in the 1976 book "Bringing Down America" in which he exposed the inner workings of the Weather Underground and the personal activities of many of its members, including Bill Ayers and Bernardine Dohrn.