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				  Ateamofelitecaversledby68-yearoldBillStoneattemptsamonths-longexpeditiontoofficiallymakeCheveCaveinOaxaca,Mexicotheworld’sdeepestcave.Amassivelogisticalundertakingabovegroundsupportstheleadteaminthedepthsastheynavigateanundergroundmazeoftwistingtunnelsanddeadendsinsearchofapassagethatleadstothebottomofdeepestcaveo..aaa