Ivo Daalder, president of the Chicago Council on Global Affairs and former ambassador to NATO, joins co-host Joe Cirincione for a discussion on how the next US president should think about nuclear weapons policy, and how the US can begin working toward a nuclear-free world. Early Warning features Ploughshares Fund policy director Tom Collina and Kate Kizer of Win Without War on escalating tensions between US and Iran, and how last week's events have made us less safe.