It all began 42 years ago — Ted Turner’s creation of a 24/7 news network that would exist on something called cable TV. Few believed it could succeed. And, for its first decade, CNN largely chugged along but wasn’t seen as a game-changer or a true competitor to big broadcast news entities based in New York in the form of CBS, NBC and ABC. That all changed when war broke out between the United States and Iraq in 1991. On the night war exploded over Baghdad, CNN was the only news organization that was able to broadcast from the city...