Cats At Work The WTC

As tomorrow is the 5th anniversary fo the WTC tragedy I was reminded
of a story that I saw on the news that they actually used cats in the
search for remains in the aftermath. But for the life of me I can't
find anything on that story on the interent. Did anyone else hear of
that story, and if so where can I find a reference tot that. I want
to send it to some friends.

Thanks