Made of Sky | G Dan Mitchell Photography Reflections in the windows of the One Front Street Building, San Francisco.Made of Sky. © Copyright 2012 G Dan Mitchell – all rights reserved.Reflections in the windows of the One Front Street Building, San Francisco.Perhaps a decade ago I noticed that urban walkers, especially those from out of town, were adopting a new posture on big city streets. Many tended to walk along with heads forward and angled down, staring intently at…