Another Bomb Blast and the Home ministry gives a statement saying that the states were warned of an attack. Whenever there is a attack they say that the states were warned. Its not only in India everywhere people tell after things have happened that they told so.
Its perfectly clear its intelligence failure and that too a country like India where chaos rules roost. Whatevery they do they will not be able to stop these things. There has to be lot of changes to achieve that which I dont think we will be able to do. In case they are able to stop something its nothing but pure luck.