Survivors gather near the Route 91 Harvest festival grounds on Oct. 1, 2018, the first anniversary of the Las Vegas shooting. More than 20,000 people were at the country music festival a year earlier when a gunman opened fire from the Mandalay Bay Resort and Casino.

Survivors gather near the Route 91 Harvest festival grounds on Oct. 1, 2018, the first anniversary of the Las Vegas shooting. More than 20,000 people were at the country music festival a year earlier when a gunman opened fire from the Mandalay Bay Resort and Casino.