According to well-informed sources in Pakistan of well-establishedcredibility, there is nervousness in Pakistan that fresh enquiries by theUS into North Korea's nuclear capability might bring out hitherto unknown (tothe international community) information relating to co-operation betweenPakistan and North Korea in the nuclear and missile fields. These sources saythat Maj Gen (retd) Mahmud Ali Durrani, Pakistan's Ambassador to the US, who isa close personal friend of Gen Pervez Musharraf, has informed Gen Musharraf thatafter the North Korean nuclear test of October 9, 2006,, the US intelligence hasbeen asked to do an update of a National Intelligence Estimate of 2002 onPakistan-North Korea nuclear co-operation and to talk to Mrs Benazir Bhutto andMr Nawaz Sharif, former Pakistani Prime Ministers, about it. Details of thereported National Intelligence Estimate were given by Mr Seymour Hersh, thewell-known investigative journalist, in anarticle published by the New Yorker magazine on January 27,2003.