Israel is launching a new ground offensive against Gaza.  The military claims it's targeting tunnels that allow terrorists to infiltrate Israel and carry out attacks.  Hellfire missiles, drones and boots on the ground are all a part of the operation.  The offensive follows days of rocket fire from Hamas militants and retaliatory attacks from Israel.  The Gaza Strip is about 140 square miles and situated on Israel's southwestern border with Egypt.  More than a million and a half people live there. 

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