Finding the enemy in Iraq

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Seems to me they have looked thoroughly in Iraq for Izzat Ibrahim Al-Duri and Abu Musab al-Zarqawi. Yes it seems that way but remember they are looking in buildings and homes to find him. Where did we find Saddam? They found him in a hole in the ground! I remember before the war hearing that Saddam had underground shelters and that some reporters had said that their ears popped when descending in the elevators blindfolded. Well the question is why aren't we trying to find underground bunkers? Seems like a no brainer to me. Remember you heard this from me if we ever find them in a bunker.