Rajan Menon: Hypersonic Weapons and National (In)security tomdispatchNovember 24, 2019Hypersonic weapons close in on their targets at a minimum speed of Mach 5, five times the speed of sound or 3,836.4 miles an hour. Click to email a link to a friend (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Read the full article.