For the last 27 years, Karl Bushby has been walking around the world, clocking more 30,000 miles from South America up to the United States, across Russia and through Europe. Now, he's only 2,000 miles away from his hometown of Hull, England. Through illness, wars, a polar bear in the Arctic, finding and losing love twice, Bushby told CBS News' Ramy Inocencio that his quest was about living life "to the fullest where I can." "Don't be afraid," he said on what he's learned about the experience. "