target, so, again, you know, really testing the bounds of the equipment. >> christine, how long before the salt in the water eats away any evidence that may be found on the debris? i would imagine it is a little early now, but the longer this goes on, that becomes a real possibility. >> absolutely. what is happening 17 days into this is that the debris that we had or we think we have located is still moving around in the water, the waters are churning. there are some storm systems. they're tracking to track that debris and find t the loit. we don't know what the debris is. clearly the longer it is in the water, exposed to the elements, the harder it will make for us to really be able to identify a lot or even find it. there are objects that could very well be sinking as we speak. and that's dependent on the conditions and where, in fact, they are. that's difficulty. >> christine, i want to ask you