Washington Post; "US Sanctions with Teeth"; Ignatius; Feb 2007

Old "sanctions" didn't work, eg in Cuba. But North Korea and Iran's sanction different--certain banks can be cut off entirely from the dollar system. Because of globalization, this quarantine basically extends to the entire network. Part of the Patriot Act. Specific banks targeted for egregiously supporting terrorism in some way, but the effect, since host countries suffer, is all countries look more closely for front companies or money laundering operations