Las Vegas Shooting Tops List Of Worst Mass Shootings In US History

This undated photo provided by the Las Vegas Metropolitan Police Department shows Marilou Danley. Danley is being sought by the LVMPD for questioning in connection with the investigation into the active shooter incident on Sunday, Oct. 1, 2017. (Las Vegas Metropolitan Police Department via AP)

A man waits during lockdown at the Tropicana Las Vegas during an active shooter situation on the Las Vegas Strip. (Chase Stevens/Las Vegas Review-Journal via AP)

People assist a wounded woman at the Tropicana. PIC/AP.

Police run to cover at the scene of a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip. PIC/AP.

Police stand at the scene of a shooting along the Las Vegas Strip. PIC/AP.

A wounded woman is moved outside the Tropicana. PIC/AP.

People are searched by Las Vegas police at the Tropicana Las Vegas during an active shooter situation on the Las Vegas Strip. PIC/AP.

Las Vegas police respond during an active shooter situation on the Las Vegas Strip near Tropicana Avenue. PIC/AP.

A wounded woman is moved outside the Tropicana during an active shooter situation on the Las Vegas Strip in Las Vegas. PIC/AP.

A gunman perched high on the 32nd floor of a Las Vegas Strip casino unleashed a shower of bullets down on an outdoor country music festival below, killing at least 50 people and wounding more than 200 as tens of thousands of frantic concert-goers screamed and ran for their lives, officials said Monday. It was the worst mass shooting in modern U.S. history. A woman sits on a curb at the scene of a shooting outside of a music festival along the Las Vegas Strip. PIC/AP.