Larry Grathwohl
Larry David Grathwohl was a United States Army veteran and a Federal Bureau of Investigation informant in the 1970s. He infiltrated the Weather Underground and co-wrote a book about his experiences: Bringing Down America: An FBI informer with the Weathermen.
Grathwohl was in the 2nd Battalion, 502nd Regiment, 101st Airborne Division from 1965 to 1966 and served in the Vietnam War. He became a sergeant.