WhatsApp is seen with other mobile apps on a smartphone in Beijing, Tuesday, July 18, 2017. Users of WhatsApp in China and security researchers reported Tuesday widespread service disruptions amid fears that the popular messaging service may be at least partially blocked by authorities in the world's most populous country. The app was partly inaccessible unless virtual private network software was used to circumvent China's censorship apparatus, known colloquially as The Great Firewall. (AP Photo/Andy Wong)

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