European Union foreign policy chief Javier Solana, left, stands with Iranian negotiator Saeed Jalili, right, at the opening of the Geneva talks between Iran and six world powers to discuss the Islamic republic's disputed atomic programme in Geneva, Thursday, Oct. 1, 2009. The U.S. and five other world powers began high-stakes talks Thursday with Iran to demand a freeze of its nuclear activities, with a senior U.S. official saying Washington is open to rare one-on-one talks with Iranian diplomats.