In this March 5, 2020, photograph, visitors climb a gypsum dune in White Sands National Park at Holloman Air Force Base, N.M. Most national parks are open as a refuge for Americans tired of being stuck at home because of the coronavirus. Entry fees have been eliminated, but many parks are closing visitor centers, shuttles and lodges to fight the spread of the virus. (AP Photo/David Zalubowski)(AP Photo/David Zalubowski)

March 22, 2020