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 . In 2006 Gadahn was the first American charged with treason in more than half a century . Peter Bergen : Many Americans would argue such a decision requires review by courts .
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 .