CNN Wolf July 22, 2014 17:35:00
Has hampered israeli movement. allowing hamas to pop up unexpectedly, firing on soldiers or tossing grenades before dropping back out of sight. israeli military officials refer to the undergroundworks as lower gaza and suggest some of the war is being waged underground. engineers meth thoughtically work to destroy them. using heavy earth moving equipment or explosives. israel believes there are many more tunnels yet to be found. and as soldiers battle through gaza streets, another danger lurks just beneath their feet. martin savidge, cnn, jerusalem. >> joining us from west bank, ramallah, spec...