New Delhi, Oct 21 (ANI): Union Home Minister Rajnath Singh paid his respects to the police officers who have sacrificed their lives for the nation at the police memorial ground in Chanakyapuri, on the occasion of Police Commemoration Day in New Delhi on Tuesday. October 21 is observed as 'Commemoration Day' every year in all police lines throughout the country to mark the memory of the gallant personnel who were killed in Ladakh and all other police personnel killed on duty in 1959. The Police Commemoration Day Parade is being held at the national level since 2012 at the Police Memorial, Chanakyapuri.