It's fair to say that the nation's public lands, those managed by the National Park Service, the Bureau of Land Management, the U.S. Forest Service and other federal land-management agencies are at risk under the Trump administration.

There's no hyperbole in that statement if you pay attention to what the administration already has done in terms of downsizing those agencies' workforces, and when you listen to Interior Secretary Doug Burgum say he wants to open more public lands to energy development and mining.

Federal lands in the United States are owned by all Americans, but at various times there have been efforts to wrench those lands away from the government to give to the states or sell off.

Walt Dabney spent his professional career protecting public lands during his decades-long stint with the National Park Service and then as director of the Texas State Parks. Now he is working to educate Americans on their vested interest in those lands and what could be lost if Congress or the White House tries to get rid of them.