"US TV channels have never been credible news sources."
Well, I have to disagree with that... but only the absoluteness of it. "Never" is, in my opinion, not correct. During WWII there was censorship of the news coming out of the war zones. This censorship was not initiated by the government but by the networks themselves after they met and decided, correctly, that certain news had a high probability of aiding the enemy in certain ways. The result was a group of individuals from the networks censoring the news content to remove articles they felt had the potential to aid the enemy. Most likely they had government help at that point, but I actually believe that at that point in our history the news organizations were very credible. I do NOT however have the experience or skill set needed to analyze the news since then to determine when the credibility started falling.
CpnTripps