U.S. and U.K. holding U.N. screening of documentary on Russia's siege of Ukrainian city of Mariupol

The United States and Britain have invited ambassadors, journalists and representatives of a broad spectrum of society to a U.N. screening of the award-winning documentary "20 Days in Mariupol," which follows a trio of Associated Press journalists during Russia's relentless siege of the Ukrainian port city in the early days of the war.