Tens of thousands remain the streets of Hong Kong in the fourth day of mass protests calling for greater political freedom. The demonstrations swelled over the weekend after a crackdown on students opposing China’s plan to select candidates in Hong Kong’s 2017 elections. Protest leaders have vowed to remain and take over government buildings until the resignation of Hong Kong city leader, Leung Chun-ying, and a free vote for his successor. Today’s protests come as China and Hong Kong observe National Day, which marks the anniversary of Communist China’s founding.