Since the Columbine High School shooting in 1999, there have been 17 major shootings in the US, in which not less than 10 people were brutally and senselessly murdered. Military Style Assault Weapons were used in all but 3 of these senseless shooting attacks. The bloodiest of these attacks were at Sandy Hook Elementary School, the Mandalay Bay Hotel, and Stoneham Douglas High School. All of these senseless shooting attacks were preventable.