THE suicide attack on a bus carrying employees of the Kahuta Research Laboratories (KRL) in Rawalpindi on Thursday came as a shock to a nation already traumatized by the rising tide of terrorism. The City Police Chief had initially informed the media that six people had been killed, but he later revised the figure down: one (the bomber) dead and 40 wounded. People on the spot were quoted as saying the bomber, who was in his 20s, rammed the motorbike into the 42-seat bus when it stopped at a traffic light on Peshawar Road. A similar strike had earlier been carried out in a nearby area. Police officials however insist that it is virtually impossible to check every vehicle entering the city. There was no immediate claim of responsibility, but many recent suicide bombings in the country have been seen as a backlash of the military offensive against the Taliban in the Malakanad Division. Rawalpindi has witnessed several suicide blasts, targeting the military and intelligence agencies. Some reports also indicated that the bus was carrying employees of the Heavy Mechanical Complex, Taxila. The most disturbing aspect of the incident is that the militants have now started attacking the very basis of the country's conventional as well as nuclear defence. Threats to our security apparatus from the inimical forces within should be the matter of grave concern for the government. The fact that the employees of the country's one of the major nuclear facilities are not provided proper security is a serious comment on the working of our law enforcement apparatus, that seems more concerned about the security of the ruling elite. The Interior Ministry needs to review its strategy rather than merely warning the people of possible acts of terrorism. There is no doubt that KRL and such other important facilities that have played a vital role in enabling Pakistan to become self-reliant in sophisticated weapon systems are duly protected by the air defence units of the Pakistan Army. There are also no worries about the safety of weapons and materials housed at these facilities in the presence of an effective regulatory authority capable of taking care of our nuclear assets. But it remains important to provide security to the scientists and technicians working at these projects, especially when they are being targeted by the militants. The government cannot afford to ignore this issue when the major US offensive against Taliban in Afghanistan's Helmand Province is likely to result in the greater influx of militants on this side of the border.