Drum magazines have been used in a number of high-profile mass shootings in the United States, fueling calls to ban drum magazines and other high-capacity magazines from civilian use. Drum magazines were used in the shooting massacres in Aurora, Colorado, in 2012; Las Vegas, Nevada in 2017 (the deadliest mass shooting in the history of the United States); and Dayton, Ohio, in 2019, allowing gunmen to fire dozens of rounds in very short periods of time, without the need to stop to reload. Experts have identified restrictions on high-capacity magazines as a factor that could make mass shooting attacks less deadly.