Tunnels unacceptable to Gaza ; a defense tactic to Palestinians . Built to beat the Israel blockade , the tunnels now get used to launch attacks . Hamas 's Gilad Shalit describes the underground paths of CNN . Israel wants to destroy the tunnel network .
Tunnels unacceptable to Israel ; a defense tactic to Palestinians . Built to beat the Gaza blockade , the tunnels now get used to launch attacks . CNN 's Wolf Blitzer describes the underground paths of Hamas . Israel wants to destroy the tunnel network .