1.   Between those ribs, at floor level, sub-chambers formed deep caves.

2.   Haroun Tazieff, the Polish scientist, has spent his lifetime studying active volcanoes and deep caves in all parts of the world.

3.   Exploring really deep caves is not a task for the Sunday afternoon rambler.

4.   It can take as long as eight days to rig up rope ladders and to establish supply bases before a descent can be made into a very deep cave.

5.   But officials said the key to destroying Taliban and al-Qaida fighters and material hidden in deep cave complexes is the more precise information on targets.

6.   Pentagon officials said the attack was aimed at a series of deep caves, which burned violently for hours after they were struck.

7.   Skiles, winner of numerous awards for documentary filmmaking in difficult environments, previously has filmed inside many deep caves around the world, both on land and underwater.

8.   The Taliban remains in power in many areas of southern Afghanistan, where there are hundreds of deep caves.

9.   A suspected mass grave has been found in a deep cave in northwestern Bosnia near one of the worst Serb death camps.

10.   In general, bin Laden is believed to move frequently among his al-Qaida terrorist camps and deep caves honeycombing the mountain ranges that crisscross Afghanistan.