The United States and South Korea have joined forces to try and stop oil shipments to North Korea that contravene UN sanctions. According to Reuters, the team effort was dubbed Enhanced Disruption Task Force and involved more than 30 officials from the two countries. The news follows a report in the Financial Times from earlier this week that said Russia was shipping fuels directly to North Korea in violation of UN sanctions, which, the report said, were nearing collapse for lack of ways to enforce them effectively. The report cited…