Theater Gunner Kills 3, Wounds 7

The picture that emerged Friday of the gunman who killed two women and wounded nine other people in a theater here was one filled with instability and rage, from a history of mental illness, to vandalizing and booby-trapping a house, to venting his fury at women’s rights, minorities and liberals. The gunman, John Russell Houser, 59, of Phenix City, Ala., who had a history of mental illness, took his own life in the theater here Thursday night, after gunning down the others during a screening of the comedy “Trainwreck,” the police said/ New York Times . More here .

Question: Why do you think these mass shootings becoming more common?