Dr. Jason Smith is the chief medical officer at the University of Louisville Hospital. The hospital treated victims of Monday's mass shooting at a bank in the city, and Smith joins us to talk about the emotional toll that doctors, nurses and other emergency room workers face when treating gunshot victims so frequently. And, the Department of the Interior has offered two potential plans of action to cut water usage from the imperiled Colorado River. Here & Now's Peter O'Dowd reports on the federal government's attempts to protect the large reservoir after 23 years of drought. Then, jazz legend Herbie Hancock turns 83 on Wednesday. The pianist and composer joins us to discuss life, death, music and his decades-long friendship with a fellow jazz icon, the late saxophonist Wayne Shorter.