What are ghost guns? Facing pressure from gun-control advocates, Joe Biden has promised to restrict the proliferation of untraceable firearms Biden takes aim at America’s rampant gun violenceUS president, making his first foray into efforts to control gun violence since taking office, plans to announce an effort to limit untraceable ‘ghost guns’. Biden to unveil actions on guns, including new ATF bossHe’s also expected to nominate David Chipman, a former federal agent and adviser at the gun control group Giffords, to be director of the Bureau of Alcohol, Tobacco, Firearms and Explosives. Biden to unveil actions on guns, including new ATF director - The Boston GlobePresident Biden is expected to nominate David Chipman, a former federal agent and adviser at the gun control group Giffords, to be director of the Bureau of Alcohol, Tobacco, Firearms and Explosives. Biden plans to unveil executive action on guns on ThursdayU.S. President Joe Biden is expected on Thursday to start rolling out executive actions regulating guns after a slew of mass shootings early in his White House tenure put pressure on the longtime advocate for gun restrictions to act. US gun violence: Joe Biden to target 'ghost guns'The move comes after mass shootings in Boulder and Atlanta last month, in which 18 people died. Biden unveiled 6 executive actions to curb gun violence, including model 'red flag' laws and action on 'ghost guns'The actions, which do not require approval from Congress, come in the wake of recent mass shootings and homicide spikes in US cities. Biden to unveil executive actions on gun violence preventionThe president faces pressure to act on the issue after recent high-profile gun violence across the U.S.