Al Baker And Kate Taylor The New York Times

Mayor Michael R. Bloomberg on Tuesday defended the New York Police Department's monitoring of the Web sites of Muslim student groups at more than a dozen universities across the Northeast, framing the effort as one way to guard against the threat of terrorism.

Mayor Michael R. Bloomberg on Tuesday defended the New York Police Department's monitoring of the Web sites of Muslim student groups at more than a dozen universities across the Northeast, framing the effort as one way to guard against the threat of terrorism.