Kim Nhung, a performer of hat cheo, traditional musical in Northern Vietnam, plays the dan da, Vietnamese percussion instrument made of stone, at the booth of department of performing Arts during the exhibition "Culture Sports and Tourism 2009: The 40th year of implementation of President Ho Chi Minh's testament," at Vietnam Exhibition and Fair Center in Hanoi,Vietnam, Saturday, August 29, 2009. The exhibition takes place Aug. 28 through Sept. 2, 2009. (AP Photo/Chitose Suzuki)