Because petrodollars. https://web.archive.org/web/20140104191101/http://en.m.wikipedia.org/wiki/Petrodollar_warfare https://web.archive.org/web/20140104191101/h

Because petrodollars. https://web.archive.org/web/20140104191101/http://en.m.wikipedia.org/wiki/Petrodollar_warfare https://web.archive.org/web/20140104191101/http://en.m.wikip...