On this date in 2009, D.C. sniper John Muhammad was executed by lethal injection in Virginia. Muhammad — born John Allen Williams; he renamed himself after joining the Nation of Islam — authored with Lee Boyd Malvo, a juvenile collaborator under his sway, a spree of random sniper attacks around the Washington D.C. suburbs that terrified the nation’s capital in October 2002. The two were captured together sleeping out in their sniper-mobile — a Chevy Caprice with a hole drilled in the trunk for taking concealed potshots at gas stations and mall parking lots and the like. Although arrested initially...