Over the past seven years , the U.S. military has spent billions of dollars on the missile defense program . Ground - based system shoots down dummy missile from hundreds of miles away . Naval Ballistic Missile Defense has conducted successful tests in 12 months , agency record . More than 80 US Navy ships eventually will be equipped with system .
Ground - based system shoots down dummy missile from hundreds of miles away . Naval Ballistic Missile Defense has conducted successful tests in 12 months , agency record . More than 80 US Navy ships eventually will be equipped with system .