Palestinian sculpture artist Nasser Flefel, 39, shows wooden keys decorated with the names of villages which were occupied during the war with Israel in 1948 in his wood-carving shop in Gaza City, May 16, 2010. Hundreds of thousands of Palestinian refugees marked on May 15, the 62nd anniversary of the founding of the state of Israel, calling it "Nakba" or the "day of the catastrophe", when in 1948 many people were displaced from their lands and homes. The symbolic keys represent the hope of Palestinian refugees to return to their homes. [Xinhua]