New US Point Defense System

From Wired :

The Army's Tank-Automotive Research, Development and Engineering Center, or TARDEC, is one of several Defense Department groups looking for a way to give those troops in Hummers another layer of defense. TARDEC's solution: blast the RPG in midair, before it gets a chance to hit.

In another few years, Hummers' roofs could be covered with a dozen tubes, each filled with a foot-long mini-rocket called the FCLAS -- short for Full Spectrum Active Protection Close-In Shield. Every FCLAS would have a pair of radio-frequency sensors inside. One in the nose would detect incoming RPGs and fire off a counterstrike. A second sensor, in the rocket's side, would go off when the RPG comes within range. The FCLAS would then detonate, letting loose a hail of explosive fragments, destroying the grenade in the process. The whole attack and response would take no more than a few seconds.