 It's been an 18-month process. We've worked together over that 18 months to develop operational security plans for any and all aspects of security related to this event. The Milwaukee chief of police says it will be lawful for people to carry guns outside of the convention's security perimeter. The Israeli military says it's killed a top Hamas commander. This came in an airstrike in Gaza. But as NPR's Hadil Al-Shalchi reports, the fate of another, more senior Hamas leader is still unknown.