![The CSIS Podcast show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/028/728/small/center-for-strategic-and-international-studies.jpg)
Summary: This week's agreement on Iran's nuclear program dominated world news. Former National Security Adviser Zbigniew Brzezinski gives his perspective on the deal's significance and the tough next steps for Iran and the United States. With Colm Quinn.