Russia and China are both busy in their build up to World War IV, or will be V by now, if we count the Cold War, and War on Terrorism? The battlefields will see hypersonic weapons which are apparently unstoppable:
  http://www.breitbart.com/national-security/2018/03/27/top-commander-u-s-unable-stop-chinese-russian-hypersonic-missiles/ 
  http://www.breitbart.com/national-security/2018/03/26/the-best-preparation-south-china-sea-drills/  

“During a Senate Armed Services Committee hearing last week, Gen. John Hyten, the head of U.S. Strategic Command (STRATCOM), suggested current ballistic missile defense systems employed by America are unable to stop such weapons, known as hypersonic, which refers to missiles that can fly more than five times the speed of sound. To prevent a hypersonic missile strike, the U.S. would have to rely on nuclear deterrence, or the threat of a retaliatory U.S. strike, reports The Hill. Gen. Hyten told lawmakers: We don’t have any defense that could deny the employment of such a [hypersonic] weapon against us, so our response would be our deterrent force, which would be the triad and the nuclear capabilities that we have to respond to such a threat.…

I believe we need to pursue improved sensor capabilities to be able to track, characterize and attribute the threats, wherever they come from. And, right now, we have a challenge with that, with our current on-orbit space architecture and the limited number of radars that we have around the world.”

     Ok, but the obvious problem here is that it is probably easier to create more sneaky, faster missiles than it is to create systems to stop them, and the US system at present has failed against even the slower missiles. On the other hand, the Russians and Chinese have never claimed to be able to stop American missiles either, so the arms race is on, as each side develops faster missiles, in a race to put more money in the pockets of the globalist arms industry.