 From NPR and WBUR, I'm Deepa Fernandes in Alameda, California. And I'm Scott Tong in Boston. This is Here and Now. In an unprecedented move, the U.S. Surgeon General Vivek Murthy this week declared gun violence a public health crisis. It comes after a violent weekend, mass shootings in Montgomery, Alabama, Columbus, Ohio, and other places that left dozens of people dead or injured.