Palestinians launch a massive anti-Israel rally along the border. Hundreds of thousands are marking Palestinian Land Day - an annual event protesting Israel's confiscation of their land. Organizers say the march will be peaceful. Marches also will take place in Jerusalem, Jordan, Lebanon, Syria and Egypt. The event is to demand the return of Palestinian refugees' to homes they were forced to leave during the Arab-Israeli war in 1948. It is also meant to defy a tight Israeli blockade that has been imposed on the Gaza since 2007. The rally, dubbed the "Great March of Return", will run until May 15th.