It's odd that no one, not even a professional reviewer, notes the rather obvious fact that "Pittsburgh" is a remake of "Boom Town". John Wayne, Randolph Scott and Marelene Dietrich reprise the roles originally played by Clark Gable, Spencer Tracy and Claudette Colbert, and Oklahoma oil fields become Pittsburgh steel mills. The plot remains the same: (SPOILERS follow) two friends with a common girl friend become successful partners, then eventually become rivals when one of them (Gable in the original, Wayne in the remake) lets success get to his head, gets involved with wealthy people and marries into society, then lets his boorish behavior get him booted out. Meanwhile, his former friend marries the girl and is highly successful.