United States has accounted for all its drones , a U.S. defense official says . Iran 's navy has captured what it says is a U.S. drone after it entered Iranian airspace over the Persian Gulf . Revolutionary Guard operates only in internationally recognized air space in the Gulf , says source . The drone was seized as it flew over Gulf , Iranian state media says . U.S. 's United States says the drone was collecting data .
United States has accounted for all its drones , a U.S. defense official says . Revolutionary Guard operates only in internationally recognized air space in the Gulf , says source . The drone was seized as it flew over Gulf , Iranian state media says . U.S. 's United States says the drone was collecting data .