sentences:  Similarly, a new unit targeting cyber crime was established at the Bureau's headquarters in April 2015 with a preliminarily number of 45 staff.The unit's chief named concentrated cyber attacks as Finland's greatest threat at the time.In March 2015, the Bureau opened its first official Twitter account and in August 2015, opened its doors for the first time to the public and allowed visitors to see contents of the Bureau's Crime Museum as well as art forgeries kept inside its headquarters.