A health worker administers a polio vaccine to a child at a health center in Peshawar, northern Pakistan. AP
A health worker administers a polio vaccine to a child at a health center in Peshawar, northern Pakistan. AP
Horsemen from Badakhshan and Faryab provinces compete during the sixth annual Buzkashi League of Afghanistan in Kabul. AFP
Horsemen from Badakhshan and Faryab provinces compete during the sixth annual Buzkashi League of Afghanistan in Kabul. AFP
A worker checks a production line of thread in Zaozhuang, in eastern China's Shandong province. China's retail sales growth weakened in November, official data showed. AFP
A worker checks a production line of thread in Zaozhuang, in eastern China's Shandong province. China's retail sales growth weakened in November, official data showed. AFP
Smog from air pollution shrouds Mongolia's capital Ulaanbaatar. AFP
Smog from air pollution shrouds Mongolia's capital Ulaanbaatar. AFP
The path to the top of the inner fort of the medieval fortress Krak des Chevaliers in Syria's Homs province. During Syria's civil war, it again became a battleground. AFP
The path to the top of the inner fort of the medieval fortress Krak des Chevaliers in Syria's Homs province. During Syria's civil war, it again became a battleground. AFP
Members of the National Cadet Crops shower flower petals during Victory Day celebrations, in Bangalore, southern India. EPA
Members of the National Cadet Crops shower flower petals during Victory Day celebrations, in Bangalore, southern India. EPA
A shop window Christmas display in Amsterdam. Reuters
A shop window Christmas display in Amsterdam. Reuters
A New Year display in central Moscow. AFP
A New Year display in central Moscow. AFP
Kite surfers on the beach in Troon, on Scotland's west coast. Getty Images
Kite surfers on the beach in Troon, on Scotland's west coast. Getty Images

Best photos of December 16: Polio vaccines to child in Pakistan to Kite surfers in Scotland