The Ringling Bros. and Barnum & Bailey Circus is no more, having given its last performance in May 2017. So, how can young people now dream of running away to a life under the big top? Kevin Venardos tells NPR's Scott Simon why he created his own one-ring circus that he takes around the country in a 28-foot long truck. He also remembers his father, Lane Venardos, a CBS News executive who died in 2011, and their shared love of trains.