FILE - In this file photo taken Wednesday, Jan. 14, 2015, U.S. Secretary of State John Kerry, right, speaks with Iranian Foreign Minister Mohammad Javad Zarif, as they walk in Geneva, Switzerland, ahead of the next round of nuclear discussions. Should the talks over Iran's nuclear program collapse, the alternatives are not appealing: the war option that the United States has kept on the table has few fans, and the world does not seem willing to truly bring Iran to its knees by shutting off the flow of capital and goods. (Laurent Gillieron/Keystone via AP, File)
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