The use of the dollar since 19 70 is really key to the way that states has used sanctions. The us. Embassy in teran has been invaded and occupied by iranian students. The americans inside have been taken prisoner and according to a student spokesman, will be held as hostages until they are released. So you mention cuba, you mention north korea. Tell me some other places where the us. Has used sanctions since let's say seventies, eighties, nineties, and the types of sanctions that we're seeing,. yes.