Members of Hamas security forces prevent Palestinian protesters from reaching the border between Israel and the northern Gaza Strip, after a protest marking Land Day March 30, 2012. Israeli security forces fired rubber bullets, tear gas and stun grenades to break up groups of Palestinian stone-throwers on Friday as annual Land Day rallies turned violent. Land Day commemorates the killing by security forces of six Arabs in 1976 during protests against government plans to confiscate land in northern Israel's Galilee region. Photo by Ashraf Amra