Anwar al Awlaki

Four years ago, Anwar al Awlaki—an American citizen—was killed in an American drone strike in Yemen, marking the first targeted killing of a U.S. citizen by the U.S. government. While the attack occurred almost four years ago, the legality, morality and prudential nature of the strike, and others like it that occur nearly daily in a scattershot of countries around the world, remain a subject of much debate.