Mortars pose a significant threat to infantry as even if they aren't always lethal, they drop out of the sky and can effectively pin a squad down. Well, some crazy military engineers decided to take the Phalanx M61 (pictured above) that protects naval vessels from anti-ship missiles and toss it on the back of a truck to counter mortars before they can land.
That big white lump on the top of the M61 is a radar. Once an incoming mortar is detected, the M61 spews out several hundred shells from its six 20 mm barrels until said mortar explodes. The Phalanx M61 "Counter-Rocket" is a closed-in weapon system (or CIWS) — meaning it takes care of itself for the most part — and it can fire 4500-7000 rounds per minute.
Click on through to see the M61 play target practice with a few mortars.