National parks

In this April 19, 2014 photo provided by the National Park Service shows a female California condor at Utah's Cable Mountain in Zion National Park, Utah. Biologists have confirmed that this female California condor laid an egg that has hatched at the park and there's a new baby condor. Park rangers said Tuesday, July 11, 2019, they estimate the California condor hatched in May, nestled in a crevice of a sweeping red-rock cliff. (National Park Service via AP)

Fireworks explode over Lincoln Memorial, Washington Monument and U.S. Capitol, at the National Mall, during the Independence Day celebrations in Washington on Thursday, July 4, 2019, after President Donald Trump's 'Salute to America' remarks at Lincoln Memorial. (AP Photo/Jose Luis Magana)

FILE - In this Feb. 24, 2007, file photo, a diver holds a giant clam at the launching of a program for the preservation and propagation of the endangered species in the waters of Puerto Princesa City, Palawan province, southwestern Philippines. A South Korean actress has been charged in Thailand with catching endangered giant clams while participating in a reality TV show. (AP Photo/Bullit Marquez, File)

President Donald Trump, first lady Melania Trump, Vice President Mike Pence and Karen Pence and others stand as the US Army Band performs and the US Navy Blue Angels flyover at the end of an Independence Day celebration in front of the Lincoln Memorial, Thursday, July 4, 2019, in Washington. (AP Photo/Alex Brandon)

FILE - In this July 4, 2018, file photo, fireworks explode over Lincoln Memorial, Washington Monument and U.S. Capitol, along the National Mall in Washington, during the Fourth of July celebration. Independence Day is just over three weeks away, and nobody in Washington seems to know exactly what the July 4 celebrations in the nation’s capital will look like. President Donald Trump has stated he wants to reshape the annual event into a “Salute to America” that would feature Trump himself speaking from the steps of the Lincoln Memorial. (AP Photo/Jose Luis Magana, File)

This April 8, 2019 photo provided by the National Parks Service shows a California condor in Zion National Park in Utah. On Thursday, May 30, 2019, park rangers said they suspect a pair of endangered California condors has hatched their first egg because of behavior changes between the male and female birds. (National Parks Service via AP)

In this April 2019 photo provided by the National Park Service, park archaeologist Eva Jensen holds the 1882 Winchester rifle she found leaning against a trip in Great Basin National Park in 2014 near Baker, Nev. A new exhibit featuring the "Forgotten Winchester" has opened at the park's visitor center near the Nevada-Utah line. (National Park Service via AP)

This April 29, 2019 photo provided by the United States Geological Survey shows a grizzly bear and a cub along the Gibbon River in Yellowstone National Park, Wyo. Wildlife officials say grizzly bear numbers are holding steady in the Northern Rockies as plans to hunt the animals in two states remain tied up in a legal dispute. (Frank van Manen/The United States Geological Survey via AP)