FBI's Counterterrorism Division appoints new assistant director

The Federal Bureau of Investigation recently appointed John Giacalone the new assistant director of the FBI's Counterterrorism Division.

FBI Director James Comey announced the new appointment on Friday. Giacalone previously served as the deputy assistant director of the Counterterrorism Division, which is part of the FBI's National Security Branch.

Giacalone first became a part of the division in 2010 when he was appointed chief of the division's Domestic Strategic Operations Section at FBI Headquarters. The following year he became the special agent in charge of the division at the New York field office.

Giacalone previously served as deputy on-scene commander in the Iraqi theater of operations, director of the Field Intelligence Group in Philadelphia and as a supervisory special agent. He also formed a successful interagency task force to fight against organized crime in New York City's Garment District.

The FBI's National Security Branch was founded in September 2005 to respond to a presidential directive. The NSB combines the resources and missions of the FBI's weapons of mass destruction, counterintelligence, counterterrorism and intelligence elements under the leadership of a senior FBI official.

The NSB's Counterterrorism Division works with a range of partners and uses its intelligence and investigative capabilities to neutralize terrorist cells and operatives in the U.S. The division also seeks to dismantle extremist networks around the world while cutting off support provided by terrorist sympathizers.