AHuxley writes "With the U.S. trying to understand the domestic role of their foreign intelligence and counterintelligence services in 2013, what can a declassified look back into the 1960s and 1970s add to the ongoing legal debate? Welcome to the world of Interagency Security Classification Appeals Panel and the work done by the National Security Archive at George Washington University. Read how prominent anti-war critics and U.S. senators were tracked, and who was on the late-1960s NSA watch list, from Rev. Martin Luther King to civil rights leader Whitney Young, boxer Muhammad Ali, Tom Wicker, the Washington bureau chief and Washington Post columnist Art Buchwald, and Sen. Howard Baker (R-Tenn.). The NSA was aware of the legality of its work and removed all logos or classification markings, using the term 'For Background Use Only.' Even back then, NSA director at the time, Lew Allen noted: "appeared to be a possible violation of constitutional guarantees" (from page 86 of this PDF). What did the NSA think about signals intelligence sites in your country? See if your country makes the 'indefinite' list on page 392."