As Iran and the U.S. continue to square off over Iranian pursuit of nuclear power and more U.N. sanctions, Turkey has offered to try and be a mediator between the two countries. It's a complicated proposal; Turkey depends on its less-secular Middle Eastern counterpart for trade that could be threatened by sanctions. But it's also a potential win-win for all countries involved. Is Iran serious about wanting to work with the U.S.?
Jonathan Marcus is the diplomatic correspondent for the BBC.
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