The correct answer is Berlin
After the Soviets blockaded Berlin, Western allies banded together and undertook an airlift to relieve the people of Berlin.
If the movie is perhaps a documentary, then it is telling you factual information of actual events (includes pictures or pictures of actual documents or events); this makes it a primary source.
If the movie is based off of real events, has factual information, but also has added information to create a well-rounded plot, this makes it a secondary source.
Answer:
Depressions are often identified as recessions lasting longer than three years or resulting in a drop in annual GDP of at least 10%.
Explanation:
