Prime Minister Narendra Modi on Sunday addressed the nation on this year's first episode of his monthly radio program 'Mann ki Baat'. PM remembered Gandhi on his death anniversary and said that the contribution of martyrs is immortal. PM also highlighted the love of Indians for nature and animals in reference to a tigress in Pench Tiger Reserve in Madhya Pradesh who had bid adieu to the world. The tigress was called "Collar Wali Baghin." Watch this video.