People take part in a mass Tai Chi class as part of All United for Tai Chi, a national movement to improve health, at the Revolution Monument in Mexico City, Mexico, April 23, 2017.(Photo/Agencies)
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People take part in a mass Tai Chi class as part of All United for Tai Chi, a national movement to improve health, at the Revolution Monument in Mexico City, Mexico, April 23, 2017.(Photo/Agencies)
