Angry in America – With the midterm elections days away, Bill Whitaker examines how social media platforms amplify political polarization in America. Tristan Harris, the Center for Humane Technology co-founder, argues that Facebook and Twitter rely on the revenue generated by the viral nature of angry and inflammatory posts. The essence of the problem, he says, is social media's business model. Buses from the Border – Over the past few months, thousands of migrants from Central and South America have made the 2,000-mile journey to New York City on buses chartered and paid for by the states of Texas and Arizona and the city of El Paso. Anderson Cooper examines how New York City has been dealing with the influx of people and some of the glaring problems with the nation's asylum system that the crisis exposed. Ready or Not – Jon Wertheim goes inside the world of preppers, those who stock up and skill up for extreme catastrophes. No longer the sole province of militants and conspiracy theorists, prepping has gone mainstream. More than 15 million Americans are prepping today, intent on surviving disasters as varied as they are frequent. Wertheim travels the country going high and low – 200 feet down, as it were, inside a decommissioned military silo turned luxury bunker – talking to a few of the millions of Americans who have joined the movement about how they prep and why.