On the 20 year anniversary of Kargil Vijay Diwas, which is being celebrated today, President Ram Nath Kovind has tweeted saluting the valour and the grit of the war martyrs who defended India on this Day in 1999. The theme for this year's anniversary celebration of the 'Kargil Vijay Diwas' is - 'Remember, Rejoice and Renew'.