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.

So far the Chinese have carried out ten nuclear tests which include one underground test, one test of a nuclear-tipped missile and three thermo-nuclear tests. In other words, the Chinese are on a comprehensive weapons programme, which will give them thermo-nuclear warheads from the megaton range down to small yield nuclear weapons of a few kiloton range and even fractional kiloton range. They are now engaged in improving the compactness of their warheads.

On February 6, 2009, the Pakistani judiciary acquitted Abdul Qadeer (AQ) Khan, the symbol of Pakistani involvement in clandestine nuclear commerce. Since 2004, he had been under house arrest after the proliferation network, linking several countries, including Pakistan, was uncovered. Though he has been put under ‘unspecified security measures’, yet the release of AQ Khan – dubbed by the United States State Department spokesman Gordon Duguid as a ‘serious proliferation risk’ – is considered to be a disturbing development for the non-proliferation regime.

The concept of nuclear terrorism is possibly the least understood of all dangers emanating from nuclear weapons. However, certain drivers like the nuclear black market (the AQ Khan Network), proliferation of nuclear technology, and the increasing demand for nuclear energy can make it easier for terrorist organizations like Al Qaida to acquire fissile material. The threat of nuclear terrorism cannot be ignored any longer. Nuclear terrorism is a plausible phenomenon that deserves adequate consideration, substantial countermeasures, expertise, and competence to combat it.