Variety: W. Kamau Bell’s journeys have taken him to a late-night program on FX and to stages around the country. Next, he will host a new CNN series, “United Shades of America,” which launches April 24. The comedian will examine clashes of class and race in locales ranging from Alaska to East Los Angeles. While he’s not a journalist, he is extremely curious and uses that quality to get his subjects to explain their views. “I’m owning my ignorance.”