Adventurer Karl Bushby completes 28-year, 50,000-km walk

British adventurer Karl Bushby made it back to his mother's doorstep on Monday, wrapping up a 28-year, 50,000-kilometre journey that began in South America and crossed four continents on foot. The reunion with his family was emotional, marking the end of an epic trek.

What kind of personal goal would make you commit 28 years to it, and why?

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