President Biden is nominating 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, the commander-in-chief announced Thursday. Chipman would replace ATF acting director Regina Lombardo. During his time as a senior policy adviser with Giffords, he spent considerable effort pushing for greater regulation and enforcement on ghost guns, changes to the background check system and measures to reduce the trafficking of illegal firearms. Chipman spent 25 years as an agent at the ATF. During his career, he worked on stopping a trafficking ring that sent illegal firearms from Virginia to New York, and served on the ATF’s SWAT team.