A list of mass killings in the United States this year

Four people were fatally shot, and at least nine others were wounded in the latest mass killing in the U.S. That happened Wednesday at Apalachee High School, near Atlanta. Police say a teenager has been arrested and will be charged with murder. It was the country’s 29th mass killing this year, according to a database maintained by The Associated Press and USA Today in partnership with Northeastern University. At least 127 people have died this year in those killings. Last year was one of the deadliest years on record with 217 deaths from 42 mass killings in the nation.