It was at Yellowstone National Park's Hellroaring Canyon Overlook in 1972 that researchers from both Minnesota and states surrounding the national park discussed reintroducing wolves to the area.

Wolves had been wiped out of the area by the 1920s as the result of overhunting and a lack of government protection.

Greater Yellowstone was designated a recovery area and the population flourished after their reintroduction.

Researchers and photographers from Minnesota recently showed 5 EYEWITNESS NEWS how they have tracked and monitored the wolves of Yellowstone since their reintroduction in the early 1990s.

Now, more than 20 years later, the National Park Service hopes to have similar success at Isle Royale National Park, off Minnesota's North Shore.