Riots

Students wearing mask hold hands to surround St. Stephen's Girls' College in Hong Kong, Monday, Sept. 9, 2019. Thousands of demonstrators in Hong Kong urged President Donald Trump to "liberate" the semiautonomous Chinese territory during a peaceful march to the U.S. Consulate on Sunday, but violence broke out later in the business and retail district as police fired tear gas after protesters vandalized subway stations, set fires and blocked traffic. (AP Photo/Kin Cheung)

Riot police check a passenger's bag at the airport express station in downtown Hong Kong, Saturday, Sept. 7, 2019. Hong Kong authorities were limiting airport transport services and controlling access to terminals Saturday as they braced for a second weekend of disruption following overnight demonstrations that turned violent. (AP Photo/Vincent Yu)

FILE - In this Tuesday, March 20, 2018 file photo, the website of the Telegram messaging app is displayed on a computer screen in Moscow, Russia. Russian opposition supporters in this summer’s anti-government protests are increasingly relying on an encrypted messaging app. Although officially banned in Russia, Telegram is still running, and experts say it’s harder to hijack than other popular platforms. (AP Photo/Alexander Zemlianichenko, File)

Students wear protective gear during a protest in Hong Kong, Monday, Sept. 2, 2019. Hong Kong has been the scene of tense anti-government protests for nearly three months. The demonstrations began in response to a proposed extradition law and have expanded to include other grievances and demands for democracy in the semiautonomous Chinese territory. (AP Photo/Kin Cheung)

Pro-democracy protestors gather outside the airport in Hong Kong, Sunday, Sept. 1, 2019. The operator of the express train to Hong Kong's airport has suspended service as pro-democracy protesters gathered there following a day of violent clashes with police. Protesters gathered at the airport after online calls to disrupt travel. (AP Photo/Kin Cheung)

Protesters stand near burning items during a pro-democracy protest in causeway bay, Hong Kong, Saturday, Aug. 31, 2019. Hundreds of people are rallying in an athletic park in central Hong Kong as a 13th-straight weekend of pro-democracy protests gets underway. (AP Photo/Vincent Yu)

Demonstrators shine laser pointers during a protest at the Yuen Long MTR station in Hong Kong, Wednesday, Aug. 21, 2019. Hong Kong riot police faced off briefly with protesters occupying a suburban train station Wednesday evening following a commemoration of a violent attack there by masked assailants on supporters of the anti-government movement. (AP Photo/Kin Cheung)

Occupy Central leader Benny Tai, center, talks to reporters outside the High court in Hong Kong Thursday, Aug.15, 2019. Tai, a top opposition leader imprisoned on public disorder charges was released on bail Thursday as Hong Kong's government attempts to quell a protest movement that has paralyzed parts of the territory, including its international airport, and led to hundreds of arrests. (AP Photo/Vincent Yu)