Palestinian protesters shout slogans clsoe to the Erez crossing in the northern Gaza Strip, on May 15, 2011, as people gathered to mark the “nakbah” or “catastrophe” anniversary of Israel’s creation in 1948, as a result of which more than 760,000 Palestinians — estimated today to number 4.7 million with their descendants — were pushed into exile or driven out of their homes. According to medics 45 people were injured when the Israeli troops opened fire. AFP PHOTO/MAHMUD HAMS (Photo credit should read MAHMUD HAMS/AFP/Getty Images)