"We (National Parks Conservation Association) believe that America's national parks and historical sites embody the American spirit. NPCA plays a crucial role in ensuring that these magnificent lands and landmarks are protected in perpetuity: We advocate for the national parks and the National Park Service; we educate decision makers and the public about the importance of preserving the parks; we help to convince members of Congress to uphold the laws that protect the parks and to support new legislation to address threats to the parks; we fight attempts to weaken these laws in the courts; and we assess the health of the parks and park management to better inform our advocacy work."