Last week, three professional storm chasers died in an Oklahoma tornado that was more than two and a half miles wide. Prominent meteorologist Tim Samaras, his son, Paul Samaras, and Carl Young, were among twenty people killed by the storms that hit Oklahoma on Friday. Today on River To River, host Ben Kieffer talks with Iowa State meteorologist, Bill Gallus, about the work of Tim Samaras and the values and risks of storm chasing.