way, 30 yards deep. sometimes as long as two kilometers, one and a half miles long. so these are very important to israel. the israeli prime minister defined the paid war goal as finding and destroying the tunnels, so it is very important. in terms of stopping the rocket fire, there's another goal unfolding at the same time. israeli troops are moving in the north of gaza in urban areas, at the edges of them, going house to house, building to building, looking for rocket launching sites. they say they found a couple of dozen. one way they're finding them is they're arresting people they say are hamas members, and interrogating them, hoping they will give them the information they need. but i should stress one thing, by the way. hamas under intense pressure on the ground, also being rockets from the air and sea, still managed today to fire at least 93 rockets into israel. now, the daily average over the last two weeks was 130. so the fact they can keep it up at this rate, 93, despite the