On the other hand, Abdul Qadeer Khan further provided technical details on fission devices while addressing the local media as he puts it: "All boosted fission devices using Uranium 235 on 28 May. None of these explosions were thermonuclear, we are doing research and can do a fusion test if asked. But it depends on the circumstances, political situation and the decision of the government. As opposed to India's thermonuclear approach, Dr. N. M. Butt, senior scientist, stated that "PAEC built a sufficient number of neutron bombs— a battlefield weapon that is essentially a low yield device".