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Masks are displayed for sale at a protest site in downtown Bangkok on the second day of the "Bangkok Shutdown" in Thailand.

Paula Bronstein/Getty Images

Masks for sale at a protest site in downtown Bangkok on the second day of the “shutdown” of Thailand’s capital.

A Thai vendor carries balloons for sale in Bangkok, Thailand, Thursday, May 23 , 2013.

Sakchai Lalit/AP

A Thai vendor carries balloons for sale in Bangkok, Thailand, on Thursday.