This Gandhi Jayanti marks one year of Modi government's Swachh Bharat Abhiyan as well as the beginning of the second season of NDTV-Dettol Banega Swachh India campaign. Our campaign ambassador Amitabh Bachchan reaffirms his commitment to the cause. This year the campaign will be focusing on bringing about a change in behaviour, among school children and communities. What better way to draw attention of the students than making Big B their teacher for a day.