A man takes his seat in an airliner. Another man sits next to him and a German Shepherd sits in the seat by the aisle.
"Is that a seeing eye companion?" asked the first man.
"No, we work for the FBI" was the reply.
After takeoff the dog began to move about the airplane. He sniffs at a young woman and returns to his seat, putting one paw on his trainers leg.
"That woman in seat 12c has pot in her possession, I will have her arrested when we land" the man told the passenger.
The dog walks the aisle again stopping to sniff a gentleman in a business suit. The dog returns to his seat and puts two paws on the agents leg. "That man has cocaine" he whispers to the passenger.
The dog walks off again sniffs a very suspicious foreigner. He returns to his seat and takes a big crap on the agent.
The puzzled passenger asks the agent what the hell was that about!!
The agent shuddered, " That last guy has a bomb!!!"