From open toilets that release human waste on tracks to bio toilets, Indian Railways is key to changing India's dirty picture. As part of the Dettol-NDTV Banega Swachh India Cleanathon with Amitabh Bachchan on December 14, which will bring together the entire nation towards better sanitation and hygiene, NDTV has nominated Railway Minister Suresh Prabhu as one of its swachh ambassadors.