Instant Aerial Mine Grid Missile Defense System Discussed

As the United States and other nations work thru a bulletproof anti-missile defense shield, which will be statistically 99.999% accurate we see many different ideas and concepts being floated around academic circles. Some believe we need a redundant set of systems to track the incoming ICBMs and Aircraft Bombers with space assets while also having an in atmosphere kill system to point and shoot. The Space Based system is doable and extremely costly, but is a necessity. Micro-Spy Satellites to make pinpoint accuracy necessary for triangulation is important, but an electronic attack could wipe those out, well unless no one really knows where they are?

Would it makes sense to have instant deployable UAVs, which would launch and form temporary aerial mine grid defense systems which could track and shoot down the incoming missiles, with the net-centric help of the micro satellite system or in the even of failure of the space based system, be able to use its own triangulation to track and place a kill shot of debris in front of the ICBMs prior to multiple warhead release?

And could we design an active aerial mine missile defense system which could stay aloft during the many hours, days or months of such a threat? Is this possible, feasible or the Best Management practice from a cost and economic standpoint? Could we use small UAVs with balloons to keep them aloft in prescribed 3D locations to form a defense net? Could these units have enough firepower to shoot down a barrage or swarm of incoming missiles, enemy UAVs or stealth type bombers? Here are my thoughts;

Yes, however as you add more weight (more firepower) you make things a little tougher from a useful load technical standpoint, but a UAV to deliver a balloon to its destination for a an aerial mine field platform makes sense as you can put up an instant grid, giving you a secondary line of defense in case of massive electronic attack in space, which might take out your GPS net-centric components to guide your kill projectiles to the supersonic ICBM rocket targets.

Now then if you set these carefully placed and spaced out balloon grid defensive units up with mini-metal storm type weapons in fiberglass tubes and kept the weight down, you could fire the projectiles, which dispersed without recoil issues and also put up a wall of bullets, rockets or exploding projectiles to stop an incoming warhead. But even so, it would need to be deployed and ready to fire prior to multiple warhead separation.

One might ask then;