Haunting memories have a habit of haunting even cynical reporters. It is blazingly hot as our car moves towards Aman Vihar police station in West Delhi. We have just met about a dozen sets of parents whose children have disappeared from Prem Nagar, a slum by any yardstick. As we near the police station, I am jolted by a Delhi Development Authority signboard that proudly proclaims: �Nithari Welcomes You.