THIS SATURDAY MORNING, I SAW TWO LITTLE GIRLS ALONE AT A BUS STOP, THEIR EYES HINTING AT A STORY NO ONE SHOULD EVER KNOW. They were wearing bright yellow safety vests, as if to draw attention, and beside them, a simple blue balloon floated in the cold morning air. ====== Thomas and I were coming back from our usual Saturday morning coffee when we saw them — two little blonde girls, alone, silent, with a note placed next to a paper bag. They were wearing yellow safety vests, the kind you see on c