Beijing Has Started New 'Anti-Terror' Checks On The Subway, And The Lines Are Like Nothing You've Ever Seen

Beijing's subway network is the busiest in the world, with commuters taking about 10 million rides a day throughout nearly 200 subway stations.

These commuters, who already deal with overcrowded public transportation, massive traffic jams and air so filthy that biking or walking to work is often not an option, are experiencing a new obstacle: Airport-style security at subway stations.

On Saturday, Beijing tightened security checks at subway stations following an attack in China's troubled Xinjiang region which killed 31 people.

Here are photos from this mornings' massive lines during rush hour at Beijing's Tiantongyuan North Station.