The State Department is preparing to order the departure of all nonessential personnel from the U.S. Embassy in Baghdad due to the potential for regional unrest, two U.S. officials said Wednesday. The department, however, also is authorizing the departure of nonessential personnel and family members from Bahrain and Kuwait. That gives them an option on whether to leave the country. The Pentagon is standing by to support a potential evacuation of U.S. personnel from U.S. Embassy Baghdad, another U.S. official said. Earlier, Iran tested ballistic missile with two-tonne warhead, according to Iranian defense ministry. Watch.