Good that you mention the blowing up of wedding parties by US drones - because by the same law that allows Americans to sue the Saudi's, any victim can now sue the US for damages because of these (often quite uncontrolled) drone attacks.

And not only future drone attacks - also any victim of US armed forces since 2001, as the law goes back in time. So: you got hurt by an American in the past 15 years? Feel free to sue the US...