Parkland parent Max Schachter lost his son Alex in the shooting. Since then, Schachter has advocated for school safety in Florida and across the country.

At 2:19 p.m. on February 14, 2018, a former student at Marjory Stoneman Douglas High School in Parkland emerged from an Uber carrying a rifle bag that contained a Smith and Wesson, model MP-15 ...