FILE - This photo released by the Las Vegas Metropolitan Police Department Force Investigation Team Report, shows the interior of Stephen Paddock's 32nd floor room of the Mandalay Bay hotel in Las Vegas after a mass shooting. The Supreme Court has struck down a Trump-era ban on bump stocks, a gun accessory that allows semiautomatic weapons to fire rapidly like machine guns. They were used in the deadliest mass shooting in modern U.S. history. The high court Friday found the Trump administration did not follow federal law when it reversed course and banned bump stocks after a gunman in Las Vegas attacked a country music festival with assault rifles in 2017. (Las Vegas Metropolitan Police Department via AP, File)