find any u.s. citizens that require assistance and whatever assistance we can offer from the united states. >> i understand there are still a lot of people trapped in those buildin buildings, is that right? >> that's correct. search and rescue remains the priority there. there are still a number of people that are unaccounted for that remain trapped. we are -- the united states is providing assistance to new zealand and people of christ chur church and the disaster response team. >> compare this earthquake, i don't know if you've ever been involved in other earthquakes, but give us an estimate of how much this one has caused. >> the damage to this earthquake is quite extensive. it is -- we had a lower macitude than the previous earthquake, but the -- but the damage was far more extensive and that had happened at the lunchtime rush during the middle of the week. it was even more tragic.