The end point of Bill Thorn’s 10-kilometer journey approached, if not quickly enough. The only person to have completed every AJC Peachtree Road Race could now spy the finish line on 10th Street in Midtown, and he compelled his 89-year-old body out of a steady walk into a run. Accompanying family members raised cheers. However, Thorn’s closing burst had begun a little too soon, and the Tyrone resident returned to his walking pace.