Ram Vilas Paswan returns to NDA after 12 years; BJP president Rajnath singh says the alliance will strengthen the NDA not just in Bihar but all over the country; two navy officers are confirmed to have died in Wednesday's submarine disaster; an Army jawan kills five colleagues before shooting himself in Kashmir; Supreme Court stays the release of four convicts serving life terms in the Rajiv Gandhi assassination case; and 10 lakh people travelling by Northern Railways risk their health because of heavily polluted drinking water at stations.