Iran continues to defy the international community in its drive to acquire nuclear weapons. Arab leaders in the region rightly fear a nuclear-armed Iran. We suspected this before, but now we know for sure because of leaked diplomatic cables. King Abdullah of Saudi Arabia "frequently exhorted the U.S. to attack Iran to put an end to its nuclear weapons program," according to these communications. Officials from Jordan said the Iranian nuclear program should be stopped by any means necessary. Officials from the United Arab Emirates and Egypt saw Iran as evil, an "existential threat" and a sponsor of terrorism. If Iran isn't stopped from obtaining nuclear weapons, it could trigger a regional nuclear arms race in which these countries would seek their own nuclear weapons to protect themselves.