R. Jeffrey Smith: Scary Fast Center for Public IntegrityJune 19, 2019 How hypersonic missiles — which travel at more than 15 times the speed of sound — are touching off a new global arms race that threatens to change the nature of warfare. 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.