This week "Sunday Morning" hosted by Jane Pauley features Dr. Jon LaPook's cover story on efforts by doctors to confront gun violence. Plus: Special reports marking the 50th anniversary of the Woodstock Music and Arts Fair in Bethel, N.Y., including Jim Axelrod's interview with musicians and concertgoers who were there, and a commentary by Bill Flanagan; Michelle Miller interviews actress Angela Bassett, star of the Netflix comedy "Otherhood"; Lucy Craft visits a Japanese town where for centuries artisans have practiced the craft of "shibori," or tie-dyeing; and Jonathan Vigliotti goes swimming with whales off the coast of Sri Lanka.