News around public lands these days seems to revolve entirely around the Trump administration. In the case of Public Employees for Environmental Responsibility, many of the steps the administration is taking with the operational efficiencies of the National Park Service and other land management agencies certainly are keeping PEER busy.   But what exactly is PEER, and what is their mission? For as long as the National Parks Traveler has been in existence, going back 20 years, stories recounting PEER and its lawsuits against land-management agencies have appeared frequently in our coverage. To explain the nonprofit organization’s role, our guest today is Tim Whitehouse, PEER’s executive director.