In order to construct an operational nuclear device, terrorists need to obtain the requisite fissile materials - Highly Enriched Uranium (HEU) or plutonium. It has been proved that, generally, it is much simpler to devise a crude nuclear bomb with HEU than with plutonium. Hence, terrorists can have 'reasonable confidence' in the performance of weapons-grade HEU bombs. The magnitude of the threat of nuclear terrorism from Pakistan's HEU-based nuclear weapons programme is assuming alarming proportions. However, adequate preventive steps can be taken to minimize the danger.
Asif Zardari and the T.I.N.A. Factor
It would appear that for the moment at least the TINA factor operates in favour of the Zardari/Gilani combine especially if they continue to occupy their offices without wielding any real power.