Dangerous animals, dangerous people....One National Park Ranger's story 'Bears, bison, and unpredictable people highlight the memorable career of Terry Spangler's service as a National Park ranger. Being part of the team that put the first radio collar on a grizzly bear in Glacier National Park - and dodging bison inside Wind Cave NP are but two of the exciting events that he has experienced. As I was running, I couldn't help but have an amused thought...