А вот интересная американская дискуссия про правовые основания, по которым президент США имеет право кого-либо убивать:

http://www.newyorker.com/news/daily-comment/whom-can-the-president-kill

Поминают Кентский расстрел при Никсоне: What if those students had been Americans at a university in, say, Paris, who formed a group to protest a war? Could a President who read the D.O.J.’s white paper tell himself that they were an “associated force” based in a foreign country, or that, if they succeeded in mobilizing Congress or public opinion against what it considered a necessary military action, that they would pose an “imminent threat”? Could he kill them then? Could he do so now?