Senator Lindsey Graham thinks the best response to a Russian plane allegedly colliding with an American drone is to go on the offensive, despite the West trying for more than a year to avoid outright conflict with Moscow. “We should hold [Russia] accountable and say that if you ever get near another U.S. asset flying in international waters, your airplane would be shot down,” Graham told Fox News host Sean Hannity Tuesday night. Lindsey Graham on the encounter between a US drone and Russian