Russia, China advancing hypersonic capability https://www.youtube.com/watch?v=HqI0VTA5tsA … Middle TN center of high-tech research to maintain U.S. technological edge. Watch my exchange with @DeptofDefense Sec Mattis
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Russia, China advancing hypersonic capability https://www.youtube.com/watch?v=HqI0VTA5tsA … Middle TN center of high-tech research to maintain U.S. technological edge. Watch my exchange with @DeptofDefense Sec Mattis
