Cliff Stoll writes: Perils of dystopia: To the Chinese central government, the smog that blankets the country is not just a health hazard, it's a threat to national security.
Last month visibility in Harbin dropped to below three metres because of heavy smog. On days like these, no surveillance camera can see through the thick layers of particles, say scientists and engineers.
Existing technology, such as infrared imaging, can help cameras see through fog or smoke at a certain level, but the smog in some Chinese cities is a different story. The particles are so many and so solid, they block light almost as effectively as a brick wall.
Cliff Stoll writes: "The Times of India reports that cell phone SIM cards used by the terrorists in Mumbai were purchased in Kolkata (Calcutta), using fraudulent papers. The papers belonged to the dead uncle of a 26 year old man living in Kolkata; he is suspected of being a collaborator of the terrorists. The paper states that this highlights "the continued vulnerabilities in the system which have repeatedly been exploited by the terrorists and their collaborators to obtain cell phone connections. "We've booked them for cheating and forgery as they produced fake documents to get the SIMs. We've also slapped conspiracy charges against them for they had an ulterior motive. The arrests will throw light on the Mumbai terror module," Kolkata police's Jawed Shamim said."