Kristen Spina http://kristenspina.wordpress.com/ I hang back, following but not too closely, watching my son and his two best friends through the viewfinder, my face hidden behind the awkwardness of a zoom lens. As I watch the boys cross the red wood bridge, I snap half a dozen photos. And then again, as they settle in on the dock, taking turns casting, tossing pieces of bread to a giant turtle bobbing on the lake’s surface. There is little to show here for my son’s differences. He is simply one of the guys, enjoying a bit of freedom and fun on a weekend in the Catskills. I scan the lake and the mountains beyond, the grey clouds sitting low in the sky, and think about how remarkable the scene really is — how its very ordinariness is something to celebrate. I take a few more pictures, then leave the boys to their…