University of Northern Colorado education dean Eugene Sheehan talks about recruitment challenges facing the teaching profession. Police Officer Jason Gallardo, who works at Littleton High School, offers a window into his experiences in these times of heightened fears. Journalist Brantley Hargrove discusses his book about Tim Samaras, a legend among storm chasers. And Jacquin Buchanan is part of an international network of people who use 3-D printers to make prosthetic limbs for people for free.