Reginald Rose Biography
http://www.nytimes.com/movies/person/108874/Reginald-Rose/biography
The New York Times provides a comprehensive overview of Rose's life and work.
12 Angry Men
http://www.criterion.com/films/27871-12-angry-men
The Criterion Collection, which released Lumet's film adaptation as a "classic," provides details on the filmmaking, essays on the film, photo galleries, and other supplementary materials relating to the cinematic work.
The Cold War Museum: McCarthyism
http://www.coldwar.org/articles/50s/senatorjosephmccarthy.asp
The "witch hunt" climate of the late 1940s and early 1950s, spurred by Senator Joseph McCarthy,...