Abdul Qadeer Khan under 'house arrest' STANDFIRST, Jan 31: Investigators have uncovered a sophisticated black market in components with Islamabad at its centre. While on a tour of eight Asian countries in the summer of 2002, Colin Powell, the US secretary of state, arrived in Islamabad with a special request. Mr Powell asked President, General Pervez Musharraf, to arrest Abdul Qadeer Khan, the mastermind of Pakistan's nuclear weapons programme and a hero in the country. He said Mr Khan needed to be questioned over the alleged secret trading of Pakistan's nuclear technology to North Korea and he had evidence. An...