How far would you go to save a dog? Greg Mahle, founder of Rescue Road Trips, can tell you exactly how far he would go — and has gone. Every other week, he gets in a semi-trailer truck and leaves his home of Zanesville, Ohio, to drive a 4,200-mile route that takes him to Houston and on through nine other Southern states. The whole way, he picks up dogs who have been living in shelters. By the time he heads back north, there is an average of 80 dogs in the back of his trailer. The trip ends in New England, where the dogs go to new forever homes.