As the insurgency of the Taliban and Al Qaeda spreads in Pakistan, senior American officials say they are increasingly concerned about new vulnerabilities for Pakistan’s nuclear arsenal, including the potential for militants to snatch a weapon in transport or to insert sympathizers into laboratories or fuel-production facilities.
The officials emphasized that there was no reason to believe that the arsenal, most of which is south of the capital, Islamabad, faced an imminent threat. President Obama said last week that he remained confident that keeping the country’s nuclear infrastructure secure was the top priority of Pakistan’s armed forces.
