New Israeli Tank Defense Technolgy
In the past, tanks and APC's have relied on increasingly thick layers of armor or "reactive" technology that weakens an incoming rocket upon impact by setting off a small explosion.
Israeli weapons manufacturers have come up with active systems that prevent incoming projectiles from making contact with tanks.
The defense technolgy does not work against IED's (improvised explosive devices, otherwise known as roadside bombs) or land mines, but is rather designed to eliminate the explosive capability of threats flying at a vehicle.
It can also be outfitted for helicopters. http://doubletapper.blogspot.com/2010/07/new-israeli-tank-defense-technolgy.html