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Asia's meth crisis

By Joshua Berlinger, CNN
From the jungles of Myanmar to the streets of Hong Kong, police throughout Asia are fighting a war against methamphetamine.
BEIJING, CHINA - DECEMBER 18:  Tourists wearing masks visit the Tiananmen Square on December 18, 2016 in Beijing, China. At least 24 cities in North China issued red alerts on Friday as heavy smog will shroud the country's northern regions in the following two days.  (Photo by VCG/VCG via Getty Images)

Beijing's smog: A tale of two cities

By Joshua Berlinger, Steve George and Serenitie Wang, CNN
The first thing Jiang Wang does when she wakes up in the morning is check on her daughter to make sure she's breathing clean air.

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