I hope that nobody here gets any sense of security because they think that this looks like something that would happen "in another part of town" or to a minority or gang group that they are not part of.
Just 6 days ago, at a place calle Panera Bread (a bakery and sandwich shop 5 miles from where I live in the Memphis burbs) one middle age white dude got in an argument with another middle age white dude about how close he had parked his Yukon Denali to the other guy's Hummer.
The victim thought that the argument was over, and was just standing by the door of the bakery talking to a friend from church. The other guy had gone to his hummer to get his handgun, walked up to him and shot him multiple times in the chest. The victim saw the shooter coming at him, and could not do anything about it.
There are plenty of "bad" parts of Memphis where stuff like this happens pretty much every day over drugs, hookers, rims, sneakers, or whatever. You can avoid those areas, but some of that crime is going to leak out, and you never know when a "normal" guy is just going to snap and come at you with a gun. You are only as protected as the firepower you have within immediate reach, and your ability to employ that firearm.
The economy is going to get worse, and people are going to get more desperate. Even normal folks are going to do stupid and violent things. If you can, get a permit and carry. Train with your weapon. Be ready to use it. Even the best cops are several minutes away. That video is proof that you don't have time to call 911.