 The Surgeon General is warning that gun violence is a public health crisis in the U.S. Dr. Vivek Murthy's advisory is the first time a Surgeon General has used the platform to decry firearm violence and the consequences it has on survivors and mental health. He said Tuesday it'll take the collective commitment of the nation to stop it. A poll last year showed that more than half of U.S. adults experienced a firearm-related incident or knew a loved one who had. One in five say they've been threatened with a gun.