Armored Units Are An Integral Part Of Israel's Fighting Forces - Merkava 4 On The Move, Defending Israel's Borders - The army's armored units are an integral part of all battles. Infolive.tv brings you pictures from Israel's northern border, where you can see the Merkava 4 tank in action. A captain from the armored corps says lessons have been learned since the Second Lebanon War, but the battle front in Gaza forces soldiers to face new and different dilemmas.