Bergen : U.S. officials reported to be considering targeting an Americans citizen . He says one authorized killing of Anwar al-Awlaki by U.S. drone in U.S. . Attorney general said U.S. citizens are n't immune to attack , put forth criteria for these cases . Peter Bergen : Many Americans would argue such a decision requires review by courts .
Peter Bergen : U.S. officials reported to be considering targeting an American citizen . He says Obama authorized killing of Anwar al-Awlaki by U.S. drone in Yemen . Attorney general said U.S. citizens are n't immune to attack , put forth criteria for these cases . Bergen : Many Americans would argue such a decision requires review by courts .