Two members of a team who descended into the Huautla cave complex in Mexico describe their perilous and deadly trek into one of the world's deepest caves.The Huautla in Mexico is the deepest cave in the Western Hemisphere, possibly the world. Shafts reach skyscraper-depths, caverns are stadium-sized, and sudden floods can drown divers in an instant.With a two-decade obsession, William Stone and his 44-member team entered the sinkhole at Sotano de San August...