A man is sitting in an airliner, which is about to takeoff when another man with a Labrador Retriever occupies the 2 empty seats eside him. The Lab is situated in the middle, and the first man is looking quizzically at the dog when the second man explains that they work for the airline. The airline rep said, "Don't mind Sniffer; he's a sniffing dog, the best there is; I'll show you once we get airborne when I put him to work." The plane takes off and levels out when the handler says to the first man, "Watch this." He tells the dog, "Sniffer, search." Sniffer jumps down, walks along the aisle,