The Justice Department has filed a lawsuit against Washington, DC, challenging the city's ban on registering semi-automatic firearms. The suit argues that prohibiting residents from registering popular rifles like the AR-15 violates constitutional rights. This legal action is the latest in a series of disputes between federal authorities and the city over gun control measures. While Washington requires gun owners to register their weapons and restricts where they can be carried, federal officials have recently moved to relax enforcement of certain gun laws in the district. The lawsuit comes amid a backdrop of recent shootings and ongoing debates about crime and public safety in the nation's capital.