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On this day a year ago, President Joe Biden came to the Grand Canyon State to declare his fifth national monument since taking office. Now, Biden’s executive action, and similar orders, are under threat. And the future of national monuments could be decided in part, by voters from the battleground state of Arizona.

The National Park Service has announced that the Grand Canyon National Park has officially received its International Dark Sky Park certification. The park has been working for three years to meet the requirements that were set forth, specifically to retrofit 67 percent of the 5,000 exterior light fixtures.

Leaders from northern Arizona and northern New Mexico spoke out at a congressional hearing Wednesday about the extraction industry’s impacts to the Grand Canyon and Chaco Canyon regions.

Two people have died at the Grand Canyon in separate incidents this week that included one man stumbling over the edge of the rim while trying to take pictures, officials said.

There's a maintenance backlog at Grand Canyon National Park that persists, even as the state celebrates the park’s centennial anniversary. But a far larger challenge looms in the park’s future — climate change.

On Feb. 26 the Grand Canyon celebrates 100 years since it became a national park. With that status came many federal protections. Still over the last century the National Park Service has had to contend with many threats including dams, mines, climate change and development.More Stories From The Grand Canyon →

Have you ever wanted to walk across a vast expanse on a tightrope? Or try to jump over it on a motorcycle? Or parachute into it? One of the most popular places to try these spine-tingling stunts is the Grand Canyon. Todd Berger wrote about the history of these stunts in his book "It Happened At Grand Canyon."

The National Parks Service will reimburse parks that stayed open during the 35-day partial government shutdown.

Citing a study commissioned by the county, the Coconino County Board of Supervisors said they will push for the North Rim of the Grand Canyon to expand their tourism season.

Before the Grand Canyon became a national park, the land was home to Native American tribes.MORE: As Grand Canyon National Park Turns 100, It Collaborates With Tribes →