Prime Minister Ariel Sharon returned to the operating room to undergo emergency surgery Friday after a brain scan revealed a rise in intracranial pressure and some bleeding in his brain, doctors said. Sharon’s blood pressure also rose and one of his brain lobes expanded slightly, said Dr. Shlomo Mor-Yosef, the director of Hadassah Hospital, where Sharon is being treated. Sharon’s aides rushed to the hospital to be with him during the surgery, his second in two days. Full Story