a nuclear weapon is resolved diplomatically through a negotiation oz it's resolved through force. through war. those are the options. >> joining us now, the dean of the johns hopkins school of advanced international studies and in washington senior correspondent for "time" magazine, wrote the cover story for this week's "time" magazine on the historic nuclear deal with iran. it's broader implications, the political challenges it creates and why it may be -- may be a risk worth taking. so i guess we'll start with you and the broad look at to why it may be a risk worth taking. >> well the interesting thing about this deal is that it's not just about nukes. obviously, that's the issue that is the focus of it. but in a way, iran made this