The non-profit Gun Violence Archive estimates that more than 500 people have died in mass shooting incidents in the United States in 2018. The deadly attack at a bar in Thousand Oaks, California, is the most recent mass shooting. Twelve people, not including the shooter, died. On February 14, a former student opened fire inside Marjory Stoneman Douglas High School in Parkland, Florida. Seventeen students and teachers were killed, and 17 more were injured in the deadliest shooting of the year.