FILE - In this March 16, 2010 file photo, Palestinian demonstrators hurl stones at Israeli troops in east Jerusalem. After finding high-tech solutions to halt suicide bombings and rockets, tech-savvy Israel is struggling with the resurgence of a weapon dating back to David and Goliath: the hurled rock. The Palestinian rock thrower emerged as an iconic image of the first uprising against Israeli occupation in the 1980s, and rock throwing has been a regular feature of demonstrations since then. (AP Photo/Dan Balilty, File)