Hermant Kerkare, the head of the police anti-terrorist squad and one of the most high-profileofficers in the country, whowas personallyleadingthe operation, was one of thevictims.
The FBI official confirmed the investigation was helped by the Canadian intelligence services, which have been involved in a number of high-profile anti-terrorist operations with US security authorities in recent months.
Vice President Dick Cheney, who has largely kept a low profile since the September 11 terrorist attacks, returned to the spotlight with a trip to New York Thursday and a look at the wreckage of the World Trade Center.