US knows very well that Osama Bin Laden is hiding in Pakistan....and US also knows about the terrorist training centres in Pakistan sponsored by ISI and Pakistan Govt...but deliberately they dont act becuase they have to sell weapons to Pakistan and if US attacks Pakisatani region to trace the terrorists, then India will be strenghthened and US doesn't want that. If there is no tension between Pakistan and India, then US cant sell its weapons to Pakisatan. So all the terrorists which are operating in India are all brain children of US......beware of american politics.....Take action before it is too late.....