Center for National Defense director Robert Greenway tells ‘Fox & Friends Weekend’ that the U.S. will have ‘little warning’ for when Iran will produce nuclear weapons.Center for National Defense director Robert Greenway tells ‘Fox & Friends Weekend’ that the U.S. will have ‘little warning’ for when Iran will produce nuclear weapons. Read Moref522d74a-265c-5b02-a8da-330c332005d8, fnc, Fox News, on_air, primary_world, us|military, politics|foreign_policy|middle_east, world|world_regions|middle_east, world|conflicts, personality|johnny_joey_jones, video The Latest & Breaking Videos on Fox News