Of course, one of the things that I remember from the documentary was the narrator saying that apart from being part of the plots in books and movies, the most remarkable movie that was based on penetrating the Fort Knox security was the "Goldfinger." So when the opportunity came to watch the movie - of course I am a 007 fan (Casino Royale) - I grabbed it. The movie is old and you can see all the attributes of a retro movie.
The plot is simple. The Chinese Government wants to destabilize the American economy by destroying the gold that is stored there (according to US Mint, some 150 million ounces of gold is held there and is valued at $6 billion). The person they use for their plot - Operation Grand Slam - is Goldfinger (Gert Fröbe). He is a gold smuggler and surmises that when the US will not be able to use its gold, the value of his gold will skyrocket. Of course, in typical James Bond (played by Sean Connery) fashion, the plot is foiled. Very entertaining movie. Strongly recommended. You may also enjoy the soundtrack - it has been a big hit.