The opinion comes as the Interior Department seeks to scale back the land of six national monuments to make more land available for oil drilling and mining.

The Antiquities Act of 1906, signed into law by President Theodore Roosevelt, gave Congress or the president the authority to establish national monuments on federal land as a means of protecting areas for ecological, cultural, historical or scientific purposes.

Booker T. Washington is expanding its Juneteenth celebration to a three-day event starting June 20 in honor of the 160th anniversary of emancipation.

In celebration of Juneteenth National Independence Day, the National Park Service is offering free admission to all its parks and monuments.