The family of a government contractor named Lloyd Fields filed a lawsuit against Twitter after Fields was killed in Jordan in an Islamic State-linked attack.

Earlier this month, a U.S. District court judge in California dismissed that lawsuit. The family has a chance to submit a revised complaint.

For a legal perspective on this case, Michael Overing joined Take Two. He's a First Amendment attorney in Los Angeles. Professor Karen North, director of USC Annenberg's Digital Social Media Program, explained the appeal of social media sites for terrorists.

To hear Monday's conversation about how extremism can be vetted on social media, click here.

To listen to the full interview, click on the blue audio player above.