WASHINGTON - Every effort should be made to stop Iran from obtaining nuclear weapons, but failing that, the world could live with a nuclear-armed regime in Tehran, a recently retired commander of U.S. forces in the Middle East said Monday. John Abizaid, the retired Army general who headed Central Command for nearly four years, said he was confident that if Iran gained nuclear arms, the United States could deter it from using them. "Iran is not a suicide nation," he said. "I mean, they may have some people in charge that don't appear to be rational, but I doubt that...