5 things to know about mass shootings in America
- Written by Frederic Lemieux, Professor of the Practice and Faculty Director of the Master's in Applied Intelligence, Georgetown University

At least 10 students were killed at a Santa Fe, Texas high school on May 18 after a classmate opened fire with a shotgun and a .38 revolver.
The shooting came just three months after another teen shooter killed 17 in Parkland, Florida, sparking nationwide youth-led...