Hamas supporters mark group's 25th anniv. GAZA CITY, Gaza Strip Tens of thousands of Palestinians gathered for a rally in Gaza to mark the 25th anniversary of the founding of Hamas. The guest of honor is Hamas leader Khaled Mashaal, who entered Gaza yesterday after 45 years of exile, reports CBS News correspondent Robert Berger. Thousands of Hamas supporters, some of them flashing victory signs, were braving the rain to attend the event. Some parents brought children dressed in military uniforms. The anniversary comes two weeks after the bloodiest round of Israel-Gaza fighting in four years. The rally is celebrating what is seen as Hamas' "victory" in last month's conflict with Israel. Hamas has portrayed itself as the victor of the eight-day conflict because Israel agreed to an Egyptian-brokered truce instead of sending in ground troops, as it initially threatened.