Hypersonic Missiles Are Unstoppable. And They’re Starting a New Global Arms Race. The new weapons — which could travel at more than 15 times the speed of sound with terrifying accuracy — threaten to change the nature of warfare. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:How to Hack Your Brain (for $5,000)How Can U.S. States Fight Climate Change if Trump Quits the Paris Accord?Dr. Edmond Eger II, 86, Dies; Found Way to Make Anesthesia SaferWorld to end on September 23 – but predictor David Meade says he’s available NEXT WEEKTrilobites: Sea Turtles Appear to Be Bouncing Back Around the WorldWild Bison Killed After Wandering Across Border Into Germany