http://www.nytimes.com/2005/12/15/politics/15cnd-program.html?adxnnl=0&adxnnlx=1134739422-prhlQlufmP0paf5C7rxsIQ&pagewanted=all<>Under a presidential order signed in 2002, the intelligence agency has
monitored the international telephone calls and international e-mail messages of hundreds, perhaps thousands, of people inside the United States without warrants over the past three years in an effort to track possible "dirty numbers" linked to Al Qaeda, the officials said. The agency, they said, still seeks warrants to monitor entirely domestic communications.
<>While many details about the program remain secret, officials familiar with it said the
N.S.A. eavesdropped without warrants on up to 500 people in the United States at any given time. The list changes as some names are added and others dropped, so the number monitored in this country may have reached into the thousands over the past three years, several officials said. Overseas, about 5,000 to 7,000 people suspected of terrorist ties are monitored at one time, according to those officials.
<>Mr. Bush's executive order allowing some warrantless eavesdropping on those inside the United States
including American citizens, permanent legal residents, tourists and other foreigners is based on classified legal opinions that assert that the president has broad powers to order such searches, derived in part from the September 2001 Congressional resolution authorizing him to wage war on Al Qaeda and other terrorist groups, according to the officials familiar with the N.S.A. operation.