This is really good news for not only those in DC but for gun owners throughout America. It recognizes the rights recognized in the constitution for individuals to bear arms:

The District of Columbia’s long-standing ban on handguns was overturned Friday by a federal appeals court, which rejected the city’s argument that the Second Amendment right to bear arms applies only to militias, not individuals.
In a 2-1 decision, the judges held that the activities protected by the Second Amendment “are not limited to militia service, nor is an individual’s enjoyment of the right contingent upon his or her continued intermittent enrollment in the militia.”