X-51A

U.S. Air Force and NASA have developed a new type missile that has been a break through in missile technology. The X-51A "Waverider" has the capability to travel at Mach 5 (5 times faster than the speed of sound) for an average of 200 seconds. The missile uses rocket boosters until the newly developed scramjet system kicks in. Scramjet engines use supersonic compression, combustion, and an unique design to propel at such great speeds. What also makes this new engine unique, is there no moving parts. In order for this to work, scramjet operations must be accelerated to a specific velocity first. With this speed, developers are close to creating a projectile that can hit any target on the globe within an hour. http://en.wikipedia.org/wiki/Boeing_X-51