News Nation’s special show ‘Khoj Khabar’ brings a thorough analysis of widespread devastation in Bihar due to flood in Koshi river. We explain to you why Koshi river is called the 'Sorrow of Bihar'. The stream of the river shifts itself toward west which caused huge damages. Since last 200 years, the river shifted 110 km west. Government built a dam in 1959 but that was broken 8 times in 60 years. Watch the full details.