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Kerry urges Iran to be serious about nuclear talks

US Secretary of State John Kerry answers a question at the State Department in Washington, DC, on February 8, 2013. Kerry held out an olive branch to sanction-hit Iran on Friday, saying the world would respond if Tehran seriously addressed its nuclear proNew US Secretary of State John Kerry held out an olive branch to sanction-hit Iran on Friday, saying the world would respond if Tehran seriously addressed its nuclear program at upcoming talks. "The choice is really ultimately up to Iran," Kerry told his first press conference since becoming America's top diplomat a week ago.