Ammunition and a Remington Bushmaster rifle are seen at a gun display during a National Rifle Association outdoor sports trade show in 2017 in Harrisburg, Pa.
Dominick Reuter/AFP/Getty Images
At their StoryCorps interview in Houston, Tanai Benard, 34, and her son, Dezmond Floyd, 10, discuss what's become a grim yet routine topic at schools: active shooter drills.
Marysville Pilchuck High School, north of Seattle. In October 2014, a freshman shot five students in the cafeteria, visible in the background. It has been locked and off-limits since the shooting.
LA County Sheriff's patrol cars leave El Camino High School in Whittier, Calif., on Wednesday. A 17-year-old student threatened to open fire at the school days after the massacre at a Florida school. An alert security guard who overheard him reported it to police, who went to the boy's home and found two AR-15 rifles, authorities said Wednesday.
Students gather on the steps of the old Florida Capitol in Tallahassee, Fla., protesting for stricter gun laws on Wednesday. Students at schools across Broward and Miami-Dade counties in South Florida also planned short walkouts in support.
This undated photo from a MySpace page that appeared to belong to Chris Harper Mercer shows him holding a rifle. Authorities identified Mercer as the gunman who went on a deadly shooting rampage at Umpqua Community College in Roseburg, Ore., on Thursday.
Colorado educators take part in a concealed carry course in Englewood, Colo., on Nov. 8. The course is open to all state school employees. Participants who complete the training are eligible to apply for a permit to carry a handgun.