America 250: David Muir on national parks and Native tribes that call them home

As America marks its 250th birthday this Fourth of July, one of the best ways to celebrate is by honoring the natural wonders of the United States’ national parks.

​As America marks its 250th birthday this Fourth of July, one of the best ways to celebrate is by honoring the natural wonders of the United States’ national parks.  US As America marks its 250th birthday this Fourth of July, one of the best ways to celebrate is by honoring the natural wonders of the United States’ national parks.