There's a lot more to the story, but it turned out the bear weighed 118 pounds..............( Mule Deer).. You already stated you were armed with only a camera but what guns did the rangers utilize other than tranquilizer guns? I can't picture those rangers & their camera guy chasing after that bear with just tranquilizer guns. Even around here when they've darted bears they have "just in case" real guns but I'm not sure what they use.
