A lone gunman was shot and killed Tuesday morning after opening fire at a southeast Maryland high school; being stopped by a heroic armed security officer who engaged the shooter within seconds. According to Fox News, the suspect is the only fatality; with one male and one female student injured during the ordeal. “Our school resource officer was alerted to the event. he pursued the shooter, engaged the shooter, fired a round at the shooter,” St. Mary’s County Sheriff Tim Cameron said. “The shooter fired a round as well. In the hours and days to come, we’ll be able to...