NADI (Natural Allies in Development and Interdependence) is an initiative to articulate a collective vision of sub-regional cooperation in the Bay of Bengal Region and with South East Asia. It recognizes the region south of Himalayas from Ganga, Brahmaputra to Mekong as a contiguity of river basins with common challenges that require close cooperation beyond their political borders. It is also aimed at building collaboration with the states of North Eastern Indian region in taking forward strategic initiatives for energy and water security in the neighborhood, and the Bay of Bengal region leading towards a vibrant and secure Indo Pacific.