David Chipman, President Joe Biden’s planned nominee for director of the Bureau of Alcohol, Tobacco, Firearms and Explosives, has a long history at the agency and sports credentials in gun control advocacy sure to excite firearm safety groups.David Chipman, President Joe Biden’s planned nominee for director of the Bureau of Alcohol, Tobacco, Firearms and Explosives, has a long history at the agency and sports credentials in gun control advocacy sure to excite firearm safety groups.