U.S. Secretary of State John Kerry said on Sunday major differences persist between Iran and six world powers negotiating on Tehran’s nuclear program, with a week to go before a deadline for a deal. The United States, Britain, France, Germany, Russia and China want Iran to reduce its nuclear fuel-making capacity to deny it any means of quickly producing atom bombs. In exchange, international sanctions that have crippled the large OPEC member’s oil-dependent economy would gradually be lifted. Iran says it is enriching uranium for peaceful energy purposes only and wants the sanctions removed swiftly. But a history of hiding sensitive nuclear work from U.N. inspectors raised international suspicions and the risk of a new Middle East war if diplomacy fails to yield a long-term settlement. “Obviously we have some very significant gaps still, so we need to see if we can make some progress,” Kerry […]