The State Department’s third-ranking official says the U.S.-India nuclear deal and efforts to freeze Iran’s nuclear program are advancing the cause of nonproliferation.

Sanctions may slow Iran’s nuclear drive but won’t halt it, says Iran expert Karim Sadjadpour, who calls for shifting to a containment policy that helps "expedite political transformation."

George Perkovich, vice president for studies and director for non-proliferation at the Carnegie Endowment for International Peace, says that the letter from President Mahmoud Amadinejad of Iran to Pr…

Brian Latell, who for many years was the CIA’s top Cuban and Latin American analyst, says if Fidel Castro is unable to recover from his ailments his successors are likely to be more willing to experi…

Thomas J. Miller, a veteran U.S. diplomat, says President Barack Obama should highlight the value of multilateral diplomacy and the tension between north and south Sudan in his UN General Assembly sp…