Utah's national parks ranked as some of the happiest parks… thanks to selfies?

Greg and Holly love Utah's national parks. They're great places to get away and enjoy the great outdoors. And they're not alone -- the parks here see record-breaking attendance year after year, and now there's a new study that ranks three of Utah's national parks among America's happiest parks. But it's the way this was figured out that really made the team chuckle -- an AI tool ran through hundreds of selfies taken at the country's 63 national parks and examined the people in the pictures. The bigger the smile, the happier the park.