[digler990]

> you could design a house that would not easily be 'breached'

Most US homes have city and county building codes that regulate the number and height of windows, ostensibly for "fire rescue". Maybe you could evade this by buying a rural plot of land that is free of municipal code, but in that case you wouldn't need super security, just a long driveway with pressure sensors that alert you to anyone approaching.

[mixmax]

boat windows are a good idea here. Typically they have a welded metal or aluminium frame and an inset of 6mm hardened glass. Some have a sandwich of several layers of lexan glued together. They come in all shapes and sizes, and can be custommade relatively cheaply. You can get ones that open from the inside. They have to be sturdy since at sea they need to be able to withstand a wave of several tons of water coming at them at full speed.

Good luck getting through that.

[PhantomGremlin]

One easy retrofit solution (though certainly not anywhere as secure as Lexan) is 3m Window Film. This will probably be good enough to keep flashbangs from being fired thru windows. http://solutions.3m.com/wps/portal/3M/en_US/Window_Film/Solu...

The ad copy on that page reads:

   Because these films help hold the glass together,
   a stronger barrier is created, slowing down
   criminals to the point where they may choose
   to flee for an easier target.

Sadly, there's often only a subtle difference between a violent criminal and a SWAT team member. The personality types are often quite similar.

[ryanmarsh]

You wanna get shot in a raid? Try to going through a window. Go watch the Waco ATF raid footage.