This combination of passport photos provided by Chile's ONEMI or regional emergency office, shows from left to right, Gillhem Bellon, 25, of France; Luca Ogliengo, 25, of Italy; and Dmitry Sivenkov, 32, of Russia, three European tourists hiking around the Villarica volcano in Chile's central valley, who haven't been heard from since Wednesday evening, Nov. 7, 2012 . Teams led by special police and the Andean Aid Team have been sweeping the area around the Villarica volcano in Chile's central valley since Thursday morning.  Ogliengo's family has rented a private helicopter to join the search. (AP Photo/Chile's ONEMI)
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