Politics of pollution: China's oil giants take a choke-hold on power
Vehicles drive on the Third Ring Road on a very hazy winter day in Beijing January 12, 2013. REUTERS/Jason Lee
A Sinopec gas station is seen behind traffic lights in Hong Kong April 26, 2010. REUTERS/Bobby Yip
Our top photos from the past week.
Grand Central Station, New York's second-most-popular tourist attraction, turns 100 years old.
Moments from Hillary Clinton's time as Secretary of State.
A truck explosion causes an expressway to collapse in China.