Some of the world's leading counter-terrorism specialists have been meeting in Belfast this week.
While it has been combating loyalist street violence over recent days, the Police Service of Northern Ireland (PSNI) has also been hosting a major counter-terrorism programme.
Officers from Ireland, the United States, Canada, and Britain have been taking part in the "Leadership in Counter Terrorism" programme , which finishes today. The event is addressing intelligence and counter terrorism, policy development and resource assignment matters.
The programme was developed by the PSNI Police College in partnership with the FBI Academy and Scottish Police College.
Supt Gary Gracey, head of leadership development at the PSNI, said the Police College had been involved in the development and delivery of the counter terrorism programme for some time.
He added: A worldwide forum coming together to learn together and from each other is truly the best way to ensure that we are prepared to deal with the global threat of terror and crime."