A safe room was carved into the original house plan, and many of these are state of the art. Features might include a bank of monitors for viewing what's going on outside the room, a small kitchenette, comfortable furnishings, fresh air venting, and a hardened communications system. These expertly designed rooms can cost tens of thousands of dollars, but you don't have to be a movie star or a multi-millionaire to build your own version of a safe room. Even the most humble home or apartment can have on a place to which vulnerable family members can retreat if they are under threat.
Why should you have a safe room?
Some folks may read this and think to themselves, "I don't need a safe room when I have my 12 gauge shotgun and my 9 mm. That's just running away."
I completely understand your point. Most of the people who read prepping and survival sites are not of a "retreat" mentality. But, if a gang of 12 thugs (possibly wearing badges) kicks down your door, how likely are you to shoot every single one of them before someone gets off a lucky shot and hits you? Hint: If you aren't tactically trained, the likelihood of this is pretty slim.