GM   Saturday, July 20th, 2013 3:00 PM   "How can I help you, Ms. Harris?" Ed Tower smiled as a weathered and familiar face reached the front of the line, beckoning the old lady over to the counter. She looked up and returned the smile, scooting her walker step by step over the faded red rug until she could lean against the wooden teller's booth. Panting and shaking a little though she was, he had to give her credit; using her own two feet at the age of ninety-one was an accomplishment, esp