David Ignatius - U.S. Sanctions With Teeth - washingtonpost.com
Summary: The U.S. Treasury can declare a bank a bad actor and cut them off from the American banking system. The international system has to respond with its own controls because when the U.S. cuts you off the folks around you can't do business with you, lest they become cut off them selves. A powerful way for the U.S. to send a message.
Great example of how globalization and economics can reduce manipulate systems uses by bad actors and how money is better than terror.
