Mass shootings have horrified Americans for years with the latest one in Maine thought to have claimed the lives of at least 22 people, these are the most shocking attacks in American history.
A top military appellate court has upheld the death sentence given to a former Army officer who killed more than a dozen people in a mass shooting 14 years ago at one of the largest bases in the count.
A top military appellate court has upheld the death sentence given to Nidal Hasan, a former Army officer who killed more than a dozen people in a mass shooting 14 years ago at one of the largest bases in the country.