Documentary film Siege by Julien Bryan about the German invasion and siege of Warsaw. In 2006 this film was named to the National Film Registry of the USA by the Librarian of Congress as "a unique, horrifying record of the dreadful brutality of war".[1]. Bryan managed to smuggle his films from Poland through Germany and back to the United States by hiding the rolls in gas mask canisters purchased as souvenirs. Six weeks later, in New York City, he assembled the footage into a ten-minute newsreel called “Siege”. Released in February 1940, the film became for many viewers their first glimpse of the Nazi invasion and the first visual proof of the horrors of modern warfare.
