Palmer v. DC -- latest suit against DC
Here's the complaint, in pdf. It's filed by Alan Gura, on behalf of Second Amendment Foundation and DC residents. It challenges a number of remaining or new DC requirements, including:
Imposing a permit requirement for carrying, and then having repealed any mechanism for obtaining such permits (and refusing to register handguns if purpose stated is defense outside of home).
Refusal to issue to non-DC residents, thus violating rights to travel and equal protection.
It's one more carefully aimed followup to Heller. Heller established that the right to keep in the home would be judiciary recognized, at the federal level. The followups seek to extend that to the States, to get recognition of the right "to bear," and to chew up a number of arbitrary restrictions.