Meet the Volunteers Who Help Keep U.S. National Parks and Public Lands Running

Here are six volunteers who make a difference at National Parks and other federal lands, from an 8-year-old who does the weeding to a retired rear admiral who keeps people — and animals — safe.Here are six volunteers who make a difference at National Parks and other federal lands, from an 8-year-old who does the weeding to a retired rear admiral who keeps people — and animals — safe.