Can the military build a jet that flies faster then mach 10?

Aircraft manufacturers are currently working on SCRAM jet engines that will allow aircraft to fly at high altitude and at speeds higher than mach 10. As of 2013 the closest aircraft to 10+ is the X-43A. Materials Science is still working to find proper materials that will hold up to the extreme environment and not break down. Current thought is that NASA will have an X plane that will be able to fly continuously at mach 10+ within the next 10 years.