Security in Urumqi

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Security forces block access to the market where Thursday's explosions occurred, Urumqi, China, May 25, 2014. (Fred Wong/VOA)

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Armed police in the streets of Urumqi, China, May 25, 2014. (Fred Wong/VOA)

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Armed police deployed at the international airport in Urumqi, China, May 25, 2014. (Fred Wong/VOA)

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Armored vehicles patrol in Urumqi, China, May 25, 2014. (Fred Wong/VOA)