canine security

Today is my first cross-country trip on an airplane in 16 months, and I did not expect to start out by failing the canine security check.  He was a young, handsome, mellow-seeming dog, doing his duty, and I was not the only soon-to-be passenger noting how sweet looking he was.  None of us reached out to touch him, knowing that it is strictly verboten to interfere with a working dog, but it was tempting. I am not sure why this particular canine signaled me out.  I am very fond of dogs, so certainly it was not…