Let's say you're a practicing Muslim in America, but one of the people attending your mosque is saying some incendiary thing, maybe even radical.

How do you see something and say something to authorities?

In the past, the FBI tried to infiltrate mosques with informants to keep tabs on people, but that program ended in embarrassment and several lawsuits.

But for a look at how law enforcement is trying to collaborate with Muslim communities in the US, UCLA law professor Jon Michaels joins Take Two.