Thai cave rescue: What the search teams face

Bad weather has hampered the rescue effort for the youngsters, aged between 11 and 16, and their 25-year-old coach through the snaking Tham Luang cave -- one of Thailand's longest, and toughest to explore. It is not known why the team ventured into the cave, but they had been there before -- some of the boys knew it well. Then the heavy rains started and water likely rushed in through the cave's main entrance while simultaneously seeping through porous limestone walls.

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