Anderson Cooper has signed off from “60 Minutes” for the last time.After two decades as a correspondent on the CBS’ news magazine, he officially ended his run Sunday night. Cooper, who also hosts a news program on CNN, announced in February his plans to leave CBS, months after an internal shake-up that followed the arrival of editor-in-chief, Bari Weiss.“Things can always evolve and change, and I think that’s awesome, and things should evolve and change, but I hope the core of what ’60 Minutes’ is always remains,” Anderson said on-air. “I think the independence of ’60 Minutes’ has been critical.”Throughout...