US Under Secretary for Political Affairs Wendy Sherman (R) smiles at the start of two days of closed-door nuclear talks on October 15, 2013 at the United Nations offices in Geneva. World powers and Iran began fresh talks on Tehran’s controversial nuclear programme, after a six-month hiatus over its refusal to curb uranium enrichment in exchange for easing sanctions. AFP PHOTO / POOL / FABRICE COFFRINI (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)
