Unless Congress averts a staggering budget "sequestration" early next year the National Park System will be devastated by underfunding that could force the Park Service to shutter more than 100 parks, according to the National Parks Conservation Association.
Throughout the summer we've been celebrating the work of national park friends groups. While the summer is coming to an end, their good work continues throughout the year. And with that in mind, they could use your support to fund that work. Here's a look back at some of the park system's "essential friends" and how you can support them.