Johann Hari worries:
First, the good news. Some worthwhile safety precautions have been put in place in Pakistan over the past five years. The country’s nukes are not kept on hair-trigger alert, ready to fire at any moment. Instead, the warhead cores are kept in different places from the weapon detonation components. To put them together and make a shootable nuke would take around three days providing a long(ish) fuse in a crisis. Even if jihadis managed to seize one nuclear weapons site, they would still need to seize another one and secure transportation between the two to go nuclear.
Nothing else about this picture is reassuring...