Army, Air Force Research Labs Work Together on New Hypersonic Weapons Traveling at five-times the speed of sound, they are nearly impossible to defend against Kris Osborn · March 9, 2020 Please leave this field emptyStay Updated with Warrior Maven Subscribe for daily military news and updates delivered straight to your inbox. We don’t spam! Read our privacy policy for more info. Check your inbox or spam folder to confirm your subscription.