text:  Agents of <unk> ( 1988 ) , co @-@ authored by Jim <unk> Wall , describes what the authors claim was a secret war against the Black Panther Party and American Indian Movement carried out during the late 1960s and ' 70s by the FBI under the <unk> program . The <unk> <unk> ( 1990 ; reissued 2002 ) , also co @-@ authored with Jim <unk> Wall , examines a series of original FBI <unk> that detail the Bureau 's activities against various leftist groups , from the U.S. Communist Party in the 1950s to activists concerned with Central American issues in the 1980s . 
  