2017 Route 91 Harvest mass shooting - Mandalay Bay

On October 1, 2017, a gunman fired from a suite on the 32nd floor of the Mandalay Bay Resort and Casino into crowds at the Route 91 Harvest country music festival across from the resort, killing 60 people and injuring hundreds. The attack is recorded as the deadliest mass shooting by an individual in modern U.S. history and prompted extensive investigations and changes in event security practices. The incident occurred at the Mandalay Bay property on the Las Vegas Strip and resulted in multiple criminal and civil proceedings.