@cbsnews: After 28 years, 30 countries and more than 30,000 miles on foot, Karl Bushby has completed his epic odyssey around the world, returning home to Hull, England. Bushby says the kindness of strangers and the human spirit carried him through the challenges of his journey, which began when he was 29. Now, he tells CBS News' Ramy Inocencio that he hopes his story inspires others to dream bigger and push themselves to do more.