ABC: When you think of environmental activists, the Sierra Club and Greenpeace may come to mind. But some argue the U.S. Military is doing more to lead us toward energy independence than any other institution in America. A new breed of so-called "greenhawks" may be leading the way toward energy independence. Colonel Dan Nolan remembers the day in 2006 when the Marines, fighting a bloody insurgency in Al Anbar province, requested a hybrid electric power station. "I looked at the …