Scotland's counter terrorist unit
Media playback is unsupported on your device
Video

Police Scotland prep for terrorist threat

Police Scotland are constantly reviewing their response to the risk of a major terrorist attack.

Assistant Chief Constable Bernard Higgins told BBC Scotland that tactics are being developed to meet the changing threats they have identified.

In the second of two special reports, Cameron Buttle has been given access to the counter terrorist unit that stands ready to respond to any attack.

Go to next video: Scotland's armed police in training