BBC NEWS | Middle East | Israeli jets target Gaza tunnelsIsrael has bombed supply tunnels in the southern Gaza Strip in a second day of intense air raids aimed at forcing Hamas militants to halt rocket fire. Israeli Foreign Minister Tzipi Livni says the operation has been a success so far and the aim is to "change realities on the ground" in Gaza. Israel has threatened to launch a ground assault and is now calling up 6,500 army reservists. Palestinians
