In this April 10, 2017 photo, Troika, a self-driving robot made by LG Electronics, moves around for visitors at the Incheon International Airport in Incheon, South Korea. Robots will start roaming South Korea’s largest airport this summer, helping travelers find their boarding gates and keep its floors clean as the country prepares for its first Winter Olympics game. (AP Photo/Ahn Young-joon)
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