hotels.com. i don't need it right now. >> the clock is ticking down on when the batteries in the plane's black box are expected to start dying. if a debris field can be pinpointed, searchers will use a high-tech listening device to find the flight recorders or black boxes. the toad pinger locator has now arrived in perth, australia and will be placed aboard an australian ship. ryan todd visited the facility where that pinger locator is made. it is a fascinating story, brian. >> it is, carol.