Hamilton, a service dog trained by Chattanooga Goodwill Industries, wears a cap and gown to pose for photographs Thursday with owner Doug Williams and others at Ooltewah High School in Ooltewah, Tenn. Thursday, Feb. 7, 2013. Hamilton County school students raised the $25,000 cost of training the dog, with Ooltewah students raising the most money. (AP Photo/Chattanooga Times Free Press, John Rawlston)

John Rawlston