Video: Iranian fighter jets fired on US drone in Gulf, says Pentagon According to Pentagon spokesman George Little, Iranian warplanes fired multiple rounds, but the US craft was undamaged and returned safely to its base. Mr Little said that both President Barack Obama and the US Defence Secretary Leon Panetta were told of the incident early on. Iran was later warned that the United States would continue to conduct such surveillance flights in the region and that the military would protect its assets. Mr Little gave no indication of how the US might respond to what had happened: "We have a wide range of options from diplomatic to military to protect our military assets and our forces in the region and will do so when necessary."