Israeli President Shimon Perez speaks during the official ceremony for Israeli annual Holocaust Martyrs and Heroes Remembrance Day at the Yad Vashem Holocaust memorial in Jerusalem on April 7, 2013. (Xinhua/Jini)

Israeli Prime Minister Benjamin Netanyahu speaks during the official ceremony for Israeli annual Holocaust Martyrs and Heroes Remembrance Day at the Yad Vashem Holocaust memorial in Jerusalem on April 7, 2013. (Xinhua/Jini)

Israeli Prime Minister Benjamin Netanyahu speaks during the official ceremony for Israeli annual Holocaust Martyrs and Heroes Remembrance Day at the Yad Vashem Holocaust memorial in Jerusalem on April 7, 2013. (Xinhua/Jini)