Prime Minister Narendra Modi is all set to flag off the world's longest river cruise -- 'Ganga Vilas' -- from Varanasi to Dibrugarh via Bangladesh on January 13, Uttar Pradesh Chief Minister Yogi Adityanath said on Monday. Covering a journey of 3200 km in 50 days and passing through 27 river systems in India and Bangladesh, the cruise ship will give tourists a chance to visit over 50
