Regional Roundup: These dogs can sniff out invasive weeds

On this week’s Regional Roundup, a report on a crew of dogs helping to sniff out invasive weeds in Wyoming and a special quilting project honoring veterans in Western Colorado. PBS NewsHour science correspondent Miles O’Brien discusses the importance of science, and best-selling author Kevin Barry talks about the history of Irish miners migrating to the Rocky Mountain West in the late 1800s, the setting for his latest novel, The Heart in Winter.