As I mentioned in my last appearance in front of this committee, the threat reduction measures used so far did not require Federal Court warrants. That's the first thing that needs to be understood.
Generically, the type of activities we're talking about go from conducting an interview and overtly letting the subject of the investigation know that they are under investigation, to asking family members, friends, and community leaders to intervene when somebody is on the path to radicalization. Trying to bring a counter-narrative to stop that radicalization would be another example; it could be about preventing a terrorist target of investigation from accessing a potential target facility.
Those are the types of measures we've used so far. The risk is minimal because again, we're not talking about warranted threat reduction measures.