The Berlin Airlift: this animated history video explains why the Airlift was a critical part of German history. This is a work of nonfiction with one important exception: Erika is meant as stand-in for the children of Berlin. The opening scene is a dramatization (in fact, a lot of Berlin’s bombing happened in daylight). However, the final story with the Teddy Bear comes from a real interview with Gail Halvorsen, and is the inspiration for Erika (Source 9 in description).
As always, sources for factual claims are numbered within the subtitles.