Finally, DC's dreadful handgun ban has been delcared unconstitutional. To me, it seems so clear that the Second Amendment to the Constitution supports private ownership of guns, including handguns.
DC's attempt to reduce crime with this ban has most definitely not been successful. The ban started in 1976. Since then, crime in Washington has continued at ridiculous levels - I wouldn't drive down the streets in Anacostia by myself. If the US Supreme Court takes the case, it seems fairly likely that the court would uphold this decision. Scalia, Alito, Thomas, and Roberts could all be counted on to uphold the decision. Kennedy would be the swing vote, but he usually leans to the conservative side.
Link to CNN article about court decision