Your answer lies here
http://www.popularmechanics.com/technology/military_law/4203874.html
I basicly started this thread for others to have fun, but if you click on the diagram, it'll resize, and I just noticed that it can have multiple warheads.
Test Videos:
http://link.brightcove.com/services/player/bcpid348520180
How the X-51 Works:
While Trident II missiles with conventional warheads could be deployed in a few years, it may take a decade or more to develop the X-51 WaveRider. The WaveRider destroys targets by simply crashing into them at hypersonic speeds. But the technology in this remarkable missile may have wider applications, including ultrafast planes and new space vehicles. Designed by Boeing and Pratt & Whitney for the Air Force Research Laboratory, the X-51 uses just one moving part — the fuel pump — to hit Mach 5, or 3600 mph.
Rocket booster The X-51 is carried to 45,000 ft. by a B-52 bomber or a fighter jet, then released. A rear-mounted Army Tactical Missile Systems rocket kicks in to propel the 1600-pound missile to Mach 4.5 and 100,000 ft. The rocket then drops away and the X-51's engine takes over.
Internal inlet The missile's sharp nose funnels shock waves produced at hypersonic speeds into a rectangular opening on the craft's belly. The shock waves compress the air, eliminating mechanical parts that normally do this.
Isolator This component adjusts airflow — which can reach 2500 pounds per square foot — to a stable pressure for the combustor. Slowing airflow increases drag on the vehicle, but allows for more complete combustion.
Combustor Thrust is created when the compressed air mixes with a mist of JP-7 jet fuel and is ignited. Because hypersonic speeds generate sustained temperatures of up to 4500 degrees, the propellant also acts as a coolant — and prevents the X-51’s engine walls from melting.
Airflow PM consulted NASA to estimate the fluid dynamics for external airflow around the nose, engine, stabilizers and tail of an X-51 traveling at Mach 5. The rear contour illustrates the engine exhaust plume shape.
With Russia testing their new ICBM, this is the beginning of another Cold War.
That also means, Pakistan is back in the negotiating seat!