Iranian warplanes fired on U.S. drone over Gulf-Pentagon

WASHINGTON (Reuters) - Iranian warplanes fired at an unarmed U.S. drone in international airspace last week but did not hit the aircraft, the Pentagon said on Thursday, disclosing details of an unprecedented incident that triggered a formal warning to Tehran through diplomatic channels. The November 1 intercept was the first time Tehran had fired at an unmanned American aircraft, in a stark