The Raytheon kill vehicle did successfully intercept a mock warhead last October, discriminating between decoys and the target and destroying the latter after briefly locking onto one of the former.
As U.S. intelligence revealed last week, the destructive intercept was performed by a kinetic-kill vehicle (KKV) launched onboard a medium-range ballistic missile.
The programs in question are the Clementine II asteroid intercept experiment, the Army's Kinetic Kill Anti-Satellite Weapon and the Military Space Plane.