Places where you won't be able to wipe the wag off your dog's tail...Have you ever considered how far you walk with your dog? If you walk just 15 minutes a day you will have walked far enough in your dog's lifetime to cross the United States. With all that walking ahead of you, aren't you ready for a new place to take a hike with your dog? Doug Gelbert, author of 27 books on hiking with your dog, has brought his pack to the Pittsburgh area to sniff...