Conversation so far:
What did Slim Pickens' film career consist of?
During much of his career, Slim Pickens played mainly cowboy roles, and is perhaps best remembered today for his comic roles in Dr. Strangelove, Blazing Saddles and 1941.
Who did Slim Pickens work with?
Slim Pickens had a small but memorable role in Steven Spielberg's 1941 (1979) in scenes with Toshiro Mifune and Christopher Lee.
What was Slim Pickens' greatest accomplishment mentioned in the article?
In a large number of films and TV shows, Slim Pickens wore his own hats and boots, and rode his own horses and mules.
Did Slim Pickens win any awards?
In 1982, Slim Pickens was inducted into the Western Performers Hall of Fame at the National Cowboy & Western Heritage Museum in Oklahoma City, Oklahoma.
What was Slim Pickens' best act?
Slim Pickens credited Dr. Strangelove as a turning point in his career. Pickens said he was amazed at the difference a single movie could make.

Question: what is the most important fact mentioned in this article?
Self-contained rewrite: What is the most important fact mentioned in the article on Slim Pickens about his role in Dr. Strangelove?