Humble recommendations: serious movies about "journalism"
FIVE STAR FINAL (1931)
D: Mervyn LeRoy
with the great Edward G. Robinson (washing his hands of responsibility)
http://www.imdb.com/title/tt0021873/reference
Of course there are many others (good ones) - feel free to add your suggestions - but this one is almost forgotten so I would like to push it a little. I rate it even higher than Network.