visit some establishments and encourage them to call if they see anything that's out of place. >> at this early stage in the investigation, the unit has little to go on besides the online threat. so their goal today is a show of force. their presence on the streets could help deter a possible attack. >> today is more preventative, trying to prevent any violence. that's why we're out here now and be there for the public. >> after today, if nothing happens, do you close the case? >> no. it doesn't stop here. we will try to absolutely identify and apprehend the individual who made the threat. >> for the intelligence bureau, hateful threats like these signal what might lie ahead. >> when we say terrorism we think of it as 9/11, but extremism has really changed and we find it in many forms.