Explain how the changes that were made in Glacier after "the night of the grizzlies" support the National Park Service's founding mission: to protect wild places and the creatures that live there.

Grizzly bears are at the pinnacle of the animal world, the most powerful omnivores on the continent, but paradoxically in post-World War II America, were too often viewed as relatively safe, tourist spectacles. The film relates what happened in Glacier National Park in the summer of 1967 as almost inevitable, as was the immediately ensuing years when grizzlies were hunted to near extinction.