At least 144 people have died in 31 mass killings in the United States since the beginning of the year. Most of them, 141, died of gunshot wounds. The ages of victims ranged from 1 to 83. We mapped the 31 incidents across the U.S.
In the wake of the Florida school shooting, politicians have raised concern over the influence of violent video games and films on young people. Scientists still debate the issue, but the majority of studies show that extensive exposure media violence is a risk factor for aggressive thoughts, feelings and behaviors.