armor, regardless of strength is projectile prone. A specific shaped charge can go thru anything with enough velocity.
[link|http://info.jpost.com/C002/Supplements/CasualtiesOfWar/2002_03_14.html|http://info.jpost.co...r/2002_03_14.html]
The attack occurred less than 100 meters from the spot where three soldiers were killed and a fourth wounded when an 80-kilogram mine exploded underneath their Merkava Mk III last month. All the soldiers belong to the Sufa armored battalion, which has served in the area for a number of months.

At 6:30 a.m., an army tracker was walking in front of two tanks, with a unit of Givati Brigade soldiers on foot in the rear, to secure the road leading from nearby Netzarim, when the mine exploded underneath one of the tanks. Officials think the terrorists hid behind a mosque near the roadside and detonated the mine by remote control.

The force off the blast blew off the tank's turret, throwing the tank commander into the air and wounding the tracker.

The explosion, which set the tank on fire, killed one of the tank crew instantly; the two other crew members were burned to death.

thanks,
Bill