Yes, I was stationed in DC for 8 years.
But YOU are the one still disconnected from reality. The people you are complaining about running around with weapons are the ones who are completely unaffected by gun control laws. They are fucking CRIMINALS. They are running around shooting the crap out of each other and anyone who gets in their way and you think they'll pay attention to a law saying they cannot carry a gun?
Try taking a good, hard look at the data. The gun control laws in DC were already the most strict in the entire nation PRIOR to Heller, yet DC also STILL has the highest murder rates. From the beginning, each gun control law enacted in the area had ZERO effect on the level of gun crime. The same is true in all those areas with strict gun control laws. DC, Chicago, Boston, etc. have had strict gun control laws in place for 5+ decades, yet up through the 80s violent crime rates continued to grow unabated. It was not until some stricter laws governing criminals during the 90s, many of which were designed to keep violent criminals in jail longer, that violent crime rates started to decline slightly. The answer is simple: control criminal better, crime will be controlled better. Control guns, and only those who follow the law will be affected.
You can look up crime statistics and their relationship to gun control laws yourself. There are hundreds of sources where raw data can be found. Sites both in favor of and against gun control have their analyses, but I suggest you do it yourself, thereby avoiding the bias of both arguments. For anyone who is honest instead of chasing a declared agenda spoon fed to them, the analysis points to only one conclusion: Gun control laws DO NOT WORK TO CONTROL CRIME!!!! Any claims that they do work to control crime are either a sign of sheer unadulterated ignorance, or deliberate flat lies.