You may find it hard to believe, but Al Qaida elements have been busy the North West Africa country of Mali. They've been using bulldozers, earth movers and other heavy construction equipment left behind by fleeing construction crews to dig an elaborate network of tunnels, trenches, shafts and ramparts into remote desert bases, and in the and cliff faces of northern Mali. US intelligence sources say they're preparing for an attack on their new home by African and Western forces.