Elise Amendola/Associated PressRebekah Gregory DiMartino, who was severely injured in the Boston Marathon bombing last year, after crossing the finish line in her wheelchair Saturday in the Boston Marathon Tribute Run. She was accompanied by Tracy Kiss, left, of Framingham, Mass. Rebekah Gregory DiMartino, who was severely injured in the Boston Marathon bombing last year, after crossing the finish line in her wheelchair Saturday in the Boston Marathon Tribute Run. She was accompanied by Tracy Kiss, left, of Framingham, Mass.