'The Last Winter' looks at changing climate; Colorblindness and fall foliage

Journalist Porter Fox talks about his new book, "The Last Winter: The Scientists, Adventurers, Journeymen, and Mavericks Trying to Save the World." The book documents retreating snow and ice around the planet. And, viewfinders at parks in Tennessee allow people with colorblindness to see the many hues of fall. Blake Farmer of WPLN reports.