The administration banned bump stocks after such devices were used by the gunman who perpetrated the 2017 Las Vegas shooting. In the wake of several mass shootings during the Trump administration, including August 2019 shootings in El Paso, Texas and Dayton, Ohio, Trump called on states to implement red flag laws to remove guns from "those judged to pose a grave risk to public safety". By November 2019, he abandoned the idea of red-flag laws. Trump repealed a regulation that barred gun ownership from approximately 75,000 individuals who received Social Security checks due to mental illness and who were deemed unfit to handle their financial affairs. The administration ended U.S. involvement in the UN Arms Trade Treaty to curb the international trade of conventional arms with countries having poor human rights records.