American movie-goers flocked to the fictional African nation of Wakanda. “Black Panther” has gone from studio film to the makings of a movement. Is that good marketing? Or a sign of changing times. Also, why NBC insists on mispronouncing Pyeongchang, how high school journalists shifted the narrative in Parkland, Fla. and why a Seattle station spent $12,000 to forgive $1 million in viewers’ debt. From the Missouri School of Journalism professors Amy Simons, Earnest Perry and Mike McKean: Views of