A deminer works at a testing area in a minefield during a demonstration to the media at the Demining Center in Kampong Speu province November 27, 2011. Cambodia will open the International Mines Conference on Sunday as well as host the 11th Meeting of the States Parties, a formal meeting of the 158 states which have accepted the 1997 Convention on the Prohibition of the Use, Stockpiling, Production and Transfer of Anti-Personnel Mines and on their Destruction. REUTERS/Samrang Pring (CAMBODIA - Tags: DISASTER)