An international smuggling ring may have secretly shared blueprints for an advanced nuclear weapon with Iran, North Korea and other rogue countries, The Washington Post reported Sunday. The now-defunct ring led by Pakistani scientist Abdul Qadeer Khan is previously known to have sold bomb-related parts to Libya, Iran and North Korea. the smugglers also acquired designs for building a more sophisticated compact nuclear device that could be fitted on a type of ballistic missile used by Iran and other developing countries