In Lyng v. Northwest Indian Cemetery Protective Association, the Supreme Court considered a free exercise challenge to the U.S. Forest Service's construction of a road through an area used by certain American Indian groups for religious ceremonies. These rituals required privacy, silence, and an undisturbed natural setting, and the group argued that construction of the road would make it impossible for them to exercise their religious rights. The Court refused to enjoin construction of the road despite the fact that the road might virtually destroy the Indians' ability to practice their religion.