those tanks. >> greta: how many tanks are there? >> 25 tanks over there. >> greta: do they have special protection? >> they got all kinds of leak preventer alarms. also dikes, you know containment, if one of those tanks ruptured -- it will stay inside this containment. there's enough containment to hold one of those tanks completely rupturing. >> greta: where are we? >> right now we are in valdez narrows. mid rock, that's middle rock this is the narrowest part of valdez narrow growth tanker has to go through this narrow part. >> to get out to sea, still another 65 miles to go. that's the glacier and that