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Monday marked one year since 58 people were killed and 869 country music concertgoers were injured by a gunman on the 32nd floor of the Mandalay Bay resort in Las Vegas. The US Congress has not enacted significant gun control measures since the shooting, with survivors and activists instead shifting focus to state legislatures.

The gunman in the shooting was armed with 23 AR-style weapons, 14 of them fitted with “bump stocks” that allowed them to mimic fully automatic fire. President Donald Trump expressed support for banning the devices and directed the Justice Department to rewrite the federal regulations. 

The US Bureau of Alcohol, Tobacco, Firearms and Explosives earlier this year sought public comment on a proposal to reclassify bump stocks, but no action has since been taken by Congress. Ten states and three cities have enacted bans on the devices. California made bump stock-style devices illegal there decades ago. Gun dealers said very few of the devices were sold before the Las Vegas shooting, but demand soared afterward amid concern they might be banned.