For the country's top lawyer, this is awfully ambiguous grammatically. There are two different possible interpretations of the wording of this letter: 1. The

For the country's top lawyer, this is awfully ambiguous grammatically. There are two different possible interpretations of the wording of this letter: 1. The President cannot order the use of a weaponized drone to kill an American, unless that American is engaged in combat on American soil. 2. The President cannot order the use of a weaponized drone to kill an American on American soil, unless that American is engaged in combat.