Comment intelligence agencies are never prohibited (Score 2) 67
"The agency, like the C.I.A. and other American intelligence agencies, is prohibited by law from conducting surveillance inside the United States"
Intelligence agencies are never prohibited in reality. There are plenty of other intelligence agencies (eg, five eyes) willing to do dirty work for American intelligence agencies. Also, there are plenty of private corporations conducting surveillance inside the United States, gathering terabytes of data. The American intelligence agencies can get corporate data easily with the threat of FISA court (FISC).