GENEVA (QHA) - Iran and the six world powers are due to begin a new round of talks in Geneva over Tehran's nuclear program, according to RFE/RL. The talks starting on November 20 center on efforts to reach a deal whereby Iran suspends or rolls back sensitive nuclear activities for six months in exchange for some relief from Western sanctions. Western powers want Iran to stop enriching uranium to 20 percent, a short technical hop from weapons-grade levels. They are also concerned over a research reactor under construction at Arak in western Iran that will produce weapons-grade plutonium. U.S. President Barack Obama said on November 19 at a forum of business leaders in Washington, D.C., that both sides were negotiating seriously. "In part, because the sanctions have been so effective, we were able to get Iran to seriously come to the table and look at, how are they going to give assurance to the international community that they are, in fact, not pursuing a nuclear weapons program," Obama said. As reported earlier, the two sides last met in Geneva 10 days ago but failed to come to agreement.