VIENNA, AUSTRIA - MAY 15: A girl passes by a photo exhibition held to mark the 67th anniversary of the 'Nakba' in Vienna, Austria on May 15, 2015. For the Palestinians, Nakba is an annual day of commemoration of the displacement that preceded and followed the Israeli Declaration of Independence in 1948. Around 800,000 Palestinians had to leave their homes in Palestinian villages and towns for Arab countries Jordan, Lebanon, Syria and Egypt on the heels of Israel's establishment in 1948. (Photo by Hasan Tosun/Anadolu Agency/Getty Images)
