In Washington, newly released documents show counterterrorism agents at the Federal Bureau of Investigation have been monitoring domestic activist groups including Greenpeace, Catholic Worker, the American-Arab Anti-Discrimination Committee and PETA, the People For the Ethical Treatment of Animals. The documents indicate the F.B.I. monitored protests organized by the groups and used confidential informants inside the organizations to gain intelligence. In one case, government records show the FBI launched a terrorism investigation of PETA in Norfolk, Virginia.