Grandma-grandson duo road trip to 29 US national parks and counting



Brad Ryan said his grandma had spent most of her life in a small Ohio town, so in 2015, they went on their first road trip together. Since then, they've traveled 25,000 miles across 38 states. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT':
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http://abc.go.com/shows/world-news-tonight

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