As the Taliban is fast expanding its control over NWFP and threatening to step into Islamabad, the worried world leaders are sending their special envoys to Pakistan to press the Zardari Government and the Army for urgent measures to contain the growing menace. Already Special envoys of France, Britain, and Italy arrived in Islamabad for talks with the Pak leadership. The British Special Envoy, Sir Sherad Cooper, has planned to stay in the country for…