know what to do if i see some. there's some bears. spotting animals is one of my son, laken'laken's, junior acti. >> whoa. >> the main purpose of the national park service is to preserve the land for prosperity and in keeping with this mission, denali is one of the most pristine and untouched plaits in the u.s. within the park, 2 million acres of designated wilderness. no permanent structures can impede on the native animal and plant life. great efforts have been made by the park to follow the letter and spirit of the wilderness act of 1964 which was created to ensure large parts of america would exist untraveled by man or man himself as a visitor who does not remain. to preserve the park's wilderness, it's important to