Additional Reading and Sources:
https://www.biography.com/news/its-a-wonderful-life-movie-facts
https://www.telegraph.co.uk/films/2016/12/22/13-things-didnt-know-wonderful-life/
https://www.britannica.com/biography/Frank-Capra
https://www.chicagotribune.com/entertainment/movies/ct-jimmy-stewart-book-mov-1202-20161201-column.html