The idea of creating a missile defense shield, at least in the modern age generally consists of picking out a piece of sky, and using radars to detect anything coming through such as a missile, and then firing anti-missiles at the incoming missiles.
But perhaps there is a better way, taking a note from Star Trek, to make a force field.
Every missile hitting the force field would automatically be detonated.
Is that possible? Physicists believe it is, and it really shouldn't be that hard, although it would take a substantial amount of energy, but then again maybe not.
Okay so, let's talk about this for second shall we? Using a combination of microwaves, and terahertz beams we should be able to cause enough atmospheric disturbance to molecularly thicken the air molecules to such a point that the changing atmospheric pressure would be enough to detonate the incoming missiles.
Is this possible? Yes, it is possible, although it will take quite a bit of power to make a large shield.
But we don't really need a large shield and all, all we really need is something the size of a tabletop exactly in the missiles path, in fact, we need intersecting beams the size of a tabletop in front of all the paths of all the missiles perhaps many to stop an incoming missile swarming sequence as they approach.
Again, this is totally feasible.
We could use this to protect our nation's borders, military installations, and even our naval warships.
We could use it to detonate Intercontinental ballistic missiles in the atmosphere, or in space.
We could even use it for a space defense system.
In fact, we could use it for all sorts of things.
It is quite possible that we could use it on the ground to stop vehicles, underwater to stop torpedoes, in the air, in space, or even on the surface of the water.
And since we have the capability, and we understand the science, we should be building these today for uses in the near future.
If we had such systems we would have to worry about North Korea, Iran, or other rogue nation-states with nuclear weapons placed upon missiles.
If they were to fire such a weapon, we would just shoot them down, or cause them to pre-detonate by thickening the air.
In fact we will use the molecules of air which are already there to do the work for us, albeit with a little bit of extra energy.
Indeed I hope you will please consider all this and think on it.