Presidents can declare national monuments, but Congress must act to establish a national park.

VOA: special.2011.04.11

The National Park Service got into the act last year by installing cameras on roads it controls in Virginia.

FORBES: OUT OF FOCUS

Environmentalists were supposed to have their day in court in May to appeal the 1997 ruling by Wyoming District Court Judge William Downes that said the reintroduction of wolves into Yellowstone National Park was a violation of the Endangered Species Act.

CNN: Appeal of wolf removal rescheduled

Their key point is that, rather than go through regular channels to film in the park, The Beach was given an exemption from the National Parks Act.

CNN: POSTCARDS FROM THE BEACH