This March 12, 2020 photo provided by Katarina Takahashi shows Emerald Lake in Rocky Mountain National Park, Colo. 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. (Katarina Takahashi via AP)

March 22, 2020