A detailed investigative report by the New York Times, ProPublica and the PBS series 'Frontline' titled 'In 2008 Mumbai Killings, Piles of Spy Data but an Uncompleted Puzzle' claims that the 2008 attacks in Mumbai could have been thwarted had the US, British and India spy agencies pulled together all the strands gathered by their high tech surveillance. The report said the horrific attacks took place as a result of one of the 'most devastating near-misses in the history of spycraft' and the hidden history of the Mumbai attacks reveals the vulnerability and the strengths of computer surveillance. The report said Indian and British intelligence agencies monitored online activities of a key 26/11 planner Zarrar Shah, the technology chief of Pakistan based Lashkar-e-Taiba (LeT) terror group, but could not connect the dots before the attacks that killed 166 people including 6 Americans. The LeT tech chief also posed as an Indian while negotiating with an American company to buy a Voice-over-Internet phone service that was later used by LeT handlers to communicate with 26/11 attackers while concealing their actual origin. The report goes on in great detail and spells out Shah and other plotters' activities, but the reality was that neither the US nor British nor Indian spy agencies used it all and did not even identify Pakistani American David Headley who scouted targets in Mumbai for the attacks. Only retrospectively were the spy agencies able to help analysts put together the complete attack plan. As the saying goes, they locked the stable after the horse had bolted.