Palestinians described more scenes of chaos on Thursday at an aid distribution hub in Gaza established by a new Israeli and U.S.-backed foundation as security contractors struggled to control the crowd. People scattered as gunfire rang out, although it was not clear who fired or if there were any casualties. Experts say a nearly three-month Israeli blockade — slightly eased in recent days — has pushed the population of roughly 2 million Palestinians to the brink of famine. (AP video by Mariam Abu-Daqqa )