A married couple apparently killed two police officers and another woman in Las Vegas. The husband and wife, also killed in the shooting, appear to have held anti-government and anti-law enforcement views.
The attacks near the University of California, Santa Barbara, are renewing focus on programs aimed at requiring treatment for people who are mentally ill as a way to prevent mass shootings and other violence.
In California, a 2002 law allows authorities to require outpatient mental health care for people who have been refusing it. Proponents argue that this kind of intervention could prevent violent acts.
But counties within the state have been slow to adopt the legislation, and mental health professionals are divided over its effects.
Today is Graduation Day at Columbine High School in Littleton, Colo. And, of course, it will be an emotional time for the school's principal, Frank DeAngelis. He'll be giving his final sendoff to a senior class. Mr. DeAngelis is retiring at the end of this school year. He's one of just a few staffers who stayed on at Columbine after the 1999 mass shootings there. Fifteen people died, including the two gunmen, who were also students. As NPR's Kirk Siegler reports, the massacre and the school's response to it defined Mr. DeAngelis's career.
As fire managers in the drought-stricken Southwest gear up for another long and expensive wildfire season, federal fire scientists are trying to better understand the physics behind what makes blazes spread.