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James Bamford: NSA, the Agency That Could Be Big Brother

Deep in a remote, fog-layered hollow near Sugar Grove, W.Va., hidden by fortress-like mountains, sits the country's largest eavesdropping bug. Located in a "radio quiet" zone, the station's large parabolic dishes secretly and silently sweep in millions of private telephone calls and e-mail messages an hour.

Run by the ultrasecret National Security Agency, the listening post intercepts all international communications entering the eastern United States. Another NSA listening post, in Yakima,Wash., eavesdrops on the western half of the country.

A hundred miles or so north of Sugar Grove, in Washington, the NSA has suddenly taken center stage in a political firestorm. The controversy over whether the president broke the law when he secretly ordered the NSA to bypass a special court and conduct warrantless eavesdropping on American citizens has even provoked some Democrats to call for his impeachment.

According to John E. McLaughlin, who as the deputy director of the Central Intelligence Agency in the fall of 2001 was among the first briefed on the program, this eavesdropping was the most secret operation in the entire intelligence network, complete with its own code word - which itself is secret.

Jokingly referred to as "No Such Agency," the NSA was created in absolute secrecy in 1952 by President Harry S. Truman. Today, it is the largest intelligence agency. It is also the most important, providing far more insight on foreign countries than the CIA and other spy organizations.

But the agency is still struggling to adjust to the war on terror, in which its job is not to monitor states, but individuals or small cells hidden all over the world. To accomplish this, the NSA has developed ever more sophisticated technology that mines vast amounts of data. But this technology may be of limited use abroad. And at home, it increases pressure on the agency to bypass civil liberties and skirt formal legal channels of criminal investigation. Originally created to spy on foreign adversaries, the NSA was never supposed to be turned inward. Thirty years ago, Senator Frank Church, the Idaho Democrat who was then chairman of the select committee on intelligence, investigated the agency and came away stunned.

"That capability at any time could be turned around on the American people," he said in 1975, "and no American would have any privacy left, such is the capability to monitor everything: telephone conversations, telegrams, it doesn't matter. There would be no place to hide."

He added that if a dictator ever took over, the NSA "could enable it to impose total tyranny, and there would be no way to fight back."

At the time, the agency had the ability to listen to only what people said over the telephone or wrote in an occasional telegram; they had no access to private letters. But today, with people expressing their innermost thoughts in e-mail messages, exposing their medical and financial records to the Internet, and chatting constantly on cellphones, the agency virtually has the ability to get inside a person's mind.

The NSA's original target had been the Communist bloc. The agency wrapped the Soviet Union and its satellite nations in an electronic cocoon. Anytime an aircraft, ship or military unit moved, the NSA would know. And from 22,300 miles in orbit, satellites with super-thin, football-field-sized antennas eavesdropped on Soviet communications and weapons signals.

Today, instead of eavesdropping on an enormous country that was always chattering and never moved, the NSA is trying to find small numbers of individuals who operate in closed cells, seldom communicate electronically (and when they do, use untraceable calling cards or disposable cellphones) and are constantly traveling from country to country.

During the cold war, the agency could depend on a constant flow of American-born Russian linguists from the many universities around the country with Soviet studies programs. Now the government is forced to search ethnic communities to find people who can speak Dari, Urdu or Lingala - and also pass a security clearance that frowns on people with relatives in their, or their parents', former countries. ...