Pilots flying tourists over national parks face new rules

David Jordan / Associated Press File A plume containing sulfur dioxide gas and ash particles as it rises from the floor of Halema‘uma‘u at the summit of Kilauea volcano in Hawai‘i Volcanoes National Park.

Fewer planes and helicopters will be flying tourists over Mount Rushmore and other national monuments and parks as new regulations take effect that are intended to protect the serenity of some of the most beloved natural areas in the United States.