GPS and Satellite
The world's GPS satellite networks are a critical part of any air defense because incoming missiles and other military weapons require precise navigation at exceptionally high speed - up to 6X the speed of light - to launch and operate. Defending military require navigation to launch interceptors or evade incoming counter-measures. But before militaries even get to the guidance and boost stage, all but extremely short-range missiles engage in some level of navigational feedback.
These extremely fast missiles or UAV are game changers for traditional American air defense, Israeli short-range defense like Iron Dome or Sling, and require complete reworking of already challenged traditional defense like Patriot or MDA. Because hypersonic jets or missiles fly at such high rates of speed, with flexible trajectories that can change mid-course and fly underneath traditional missile defense response trajectories, they are game-changers.
Our Pre-Launch Missile Defense framework is disruptive. No doubt about it. It demands a shift in outlook from waiting to be attacked, and then firing back (interceptors); to simply neutralizing an enemy's 'right' to launch, guide and arm any weapon against us.
America did not get to be No. 1 by being timid. When our intent is global defense, we have the right to be even more aggressive than our enemies.