Reports: U.S. jet fighters leave UAE air base  

According to reports, U.S. warplanes have taken off from an air base in the United Arab Emirates (UAE). The Iran's Islamic Revolutionary Guard Corps has warned that if the U.S. launches attacks against Tehran from the UAE, then the UAE will become a "legitimate target" for retaliation. 

The Federal Aviation Administration earlier issued an emergency restriction for Persian Gulf airspace, citing "potential for miscalculation or misidentification."