A 64-year-old white American is blamed for Sunday night’s terrorist attacking in Las Vegas, and an ISIS publication claims responsibility. Officials, however, say there is no evidence that Stephen Paddock had connections to any militant groups. We speak with former Homeland Security official Juliette Kayyem about the shooting. Plus, we check in with reporter Gerry Hadden in Barcelona. He saw the police crackdown on Catalan voters firsthand — his kids' school was a polling place. And we look at the mysterious illnesses hitting US diplomats in Cuba, and potential causes, which include some sketchy spy techniques.