Describes the decades-long covert counterintelligence program--code-named Cointelpro--directed against socialists and activists in the Black and anti-Vietnam War movements. The operations revealed in the documents cited in this book--many of them photographically reproduced--provide an unprecedented look at the methods used by the FBI, CIA, military intelligence, and other U.S. police agencies. Despite their authors' intentions, these documents also record pieces of the history of efforts to build the communist movement in the United States.