[img]http://d.yimg.com/a/p/ap/20100831/capt.d85579265b1849739cb3c2b40a9a8a91-d85579265b1849739cb3c2b40a9a8a91-0.jpg?x=130&y=88&q=85&sig=NqwOstzvegG7ZtY1PSj8oQ--[/img]AP - The effort to save 33 men trapped deep in a Chilean mine is an unprecedented challenge, mining safety experts said Tuesday. It means months of drilling, then a harrowing three-hour trip in a cage up a narrow hole carved through solid rock.