For Independence Day, TCM is presenting some of the most patriotic movies in its entire archive. The evening begins with this 1942 movie musical, in which James Cagney, famous for portraying the toughest of gangsters during the cinema’s early days of sound films, portrays song-and-dance man George M. Cohan, and does a “Dandy” job. In a movie made during wartime, yet. Even in black and white, this movie is pure red, white and blue.