DC Concealed Carry License
When your destination is in the District, a Virginia or Maryland permit alone does not authorize concealed carry. DC also requires you to register the pistol you intend to carry.
That registration step is part of what makes the DC route in DMV concealed carry training distinct. It is not only a license to carry, but also a process for the pistol itself, so the application and the registration are considered together when you plan your DC route.