The complexity of Arab attitudes toward Iran before and after the start of the Arab uprisings is reflected not only in the gap of perception between the Arab people and Arab governments, but also in important differences on Iran across those governments. Even among Arab governments most threatened by Iran and most inclined to see it weakened, their sense of threat and how to address it differs substantially from Israel’s sense of threat.

The international community is taking gradual—yet effective—steps to secure nuclear materials, with Russia “turning the corner from nuclear problem state to nuclear solution state,” Carnegie’s Matthew Rojansky says. In this interview, he and other experts assess the 2012 Nuclear Security Summit in Seoul.

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When Iran meets with Western powers Saturday, it surely won’t agree to changes in its nuclear program, diplomats say, writes Public Policy Scholar Michael Adler. But an agreement to keep talking will be encouragement enough.