Tourists pose for pictures in front of the partially frozen Hukou Waterfall on the Yellow River in Jixian county, Shanxi province, December 29, 2013. Picture taken December 29, 2013. REUTERS/Stringer ... more 
Tourists pose for pictures in front of the partially frozen Hukou Waterfall on the Yellow River in Jixian county, Shanxi province, December 29, 2013. Picture taken December 29, 2013. REUTERS/Stringer (CHINA - Tags: SOCIETY ENVIRONMENT) CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA less 
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Reuters | Photo By CHINA STRINGER NETWORK / REUTERS
Sun, Dec 29, 2013 11:16 PM EST