Updated: Visitor misbehavior abounds as US parks agency turns 100

YELLOWSTONE NATIONAL PARK, Wyo. — Tourist John Gleason crept through the grass, four small children close behind, inching toward a bull elk with antlers like small trees at the edge of a meadow in Yellowstone National Park. “They’re going to give me a heart attack,” said Gleason’s mother-in-law, Barbara Henry, as the group came within […]