FILE – In this Monday, Oct. 9, 2017 file photo, people pray at a makeshift memorial for victims of a mass shooting in Las Vegas. Gunman Stephen Paddock opened fire Sunday, Oct. 1 from a room at the Mandalay Bay
FILE – In this Monday, Oct. 9, 2017 file photo, people pray at a makeshift memorial for victims of a mass shooting in Las Vegas. Gunman Stephen Paddock opened fire Sunday, Oct. 1 from a room at the Mandalay Bay resort and casino, on an outdoor country music concert killing dozens and injuring hundreds. A revised chronology given by investigators for the Las Vegas massacre is intensifying pressure for police to explain how quickly they responded to what would become the deadliest mass shooting in modern U.S. history. (AP Photo/John Locher, File)