On the night of October 1, 2017, a gunman opens fire on a crowd attending the final night of a country music festival in Las Vegas, killing 58 people and injuring more than 800. Although the shooting only lasted 10 minutes, the death and injury tolls made this massacre the deadliest mass shooting in U.S. history at the time of the attack.

Stephen Paddock, a 64-year-old retired man who lived in Mesquite, Nevada, targeted the crowd of concert-goers on the Las Vegas strip from the 32 floor of the Mandalay Bay hotel. He had checked into the hotel several days before the massacre.

Paddock began firing at the crowd at 10:05 p.m. using an arsenal of 23 guns, 12 of which were upgraded with bump stocks, a tool used to fire semi-automatic guns in rapid succession. Within the 10-minute period, he was able to fire more than 1,100 rounds of ammunition.

Source: history.com for the complete article