A fake identity is know in the spy trade as a false flag. It used to be you could make your own documents with a printer and a laminater. These days, though, IDs have magnetic strips, holograms and infrared watermarks, you need a pro.
In some situations a tactical retreat is your best option. A guy with a gun is a guy with a gun. You can fight him and risk someone getting shot, or wait for backup.
Corporations need spies just like goverments do. Of course, they're not called spies - they're called security consultants. They're basically mercenaries with nice suits.
One of the things you learn in training is to avoid situations that cut too close. If you had a rough childhood, a situation with an abusive father and a vulnerable kid is going to make you angry. That could be motivating, but it can also be dangerous.
Facts are at the heart of a false identity. It's harder to create history than it is to alter it. Plus, the more truth to your lie the easier it is to remember.
Just because there are no windows or doors doesn't mean that there are no exits. The thing to look for is the air conditioner unit, that's where the wall is weakest. Also, people watch doors, they don't watch air conditioners.
A basic rule of covert ops is let someone else do your dirty work, let someone else find they guy you want to kill. It's a great technique, as long as you're not the someone else.
Remove the trigger box spring from a 6 sour P228 and you got a 9mm semi-automatic doorstop.
Shoot a propane tanks and you'll just get a big cloud of cold gas. You need open flame and real good aim.
Assassination is 1% shooting, 99% preparation, anticipating moves, devising approaches, recruiting sources, finding the perfect opportunity so the bullets almost an afterthought. Usually, that's when a target is on the move, when they're too many variables to control them all. There are ways to lessen the risk: an armed escort, taking an unpredictable route to your destination, having backup in a trail car, but ultimately as long as the assassin knows where you are going they have the upper hand. It's impossible to stop an assassin from finding an opening and taking a shot. The best you can do is control where the best opening is, and sometimes that's enough.