Rabia Khatun, in her late sixties, was preparing for namaz in her Shibpur home in Howrah on Thursday evening when she came across five terrified faces — four men and a boy in his teens — shivering in fear.   Caught in the violence that was playing out on the main road — GT Road — the five had somehow scampered up a flight of steps to thefirst floor of a five-storied building, adjacent to the Shibpur police station, for shelter and did not know whom to approach. None of them knew each other...