Pro-democracy activists sleep, rest and walk on a street near the government headquarters Tuesday in Hong Kong. Students and activists, many of whom have been camped out since late Friday, spent a peaceful night singing as they blocked streets in Hong Kong in an unprecedented show of civil disobedience to push demands for genuine democratic reforms. Wong Maye-E/AP hide caption

itoggle caption Wong Maye-E/AP

Protesters march as they block the main street to the financial Central district, outside the government headquarters in Hong Kong, on Monday. Protesters at times numbering in the tens of thousands have gathered to demand the right to choose the territory's next leaders. Carlos Barria/Reuters/Landov hide caption

itoggle caption Carlos Barria/Reuters/Landov

Policemen in riot gear guard a checkpoint on a road near a courthouse where ethnic Uighur academic Ilham Tohti's trial was taking place in Urumqi, Xinjiang, last week. Tohti, an economics professor, is accused of promoting Xinjiang's independence from China. Reuters/Landov hide caption

itoggle caption Reuters/Landov

Students and teachers attend a rally during the class boycott at the Chinese University of Hong Kong on Monday. Thousands of students have braved sweltering heat to demand greater democracy for the territory. Tyrone Siu/Reuters/Landov hide caption

itoggle caption Tyrone Siu/Reuters/Landov

A team from Honolulu, which included Jamie O'Brien of Hawaii's North Shore, won this week's surfing competition, held on one of the world's two biggest tidal bores, located in Hangzhou, China. The other is in the Amazon. Courtesy of Wabsono hide caption

itoggle caption Courtesy of Wabsono

Jack Ma speaks in Hangzhou, China, on May 10, 2013. Ma shot to fame as the founder of Alibaba, the pioneering Chinese e-commerce site that's poised to be one of the biggest tech IPOs ever when it goes public in New York. Peter Parks/AFP/Getty Images hide caption

itoggle caption Peter Parks/AFP/Getty Images

Zhang Kechun. Under the Abandoned Pier, 2013-2014. Zhang, 34, spent years shooting photos along the Yellow River. Zhang Kechun/Courtesy of Three Shadows +3 Gallery hide caption

itoggle caption Zhang Kechun/Courtesy of Three Shadows +3 Gallery

A still from the surveillance camera footage shows the fainting man (top left and bottom right) lying alone in a subway car, as the few remaining occupants hurry away. YouTube hide caption

itoggle caption YouTube

This handout photo provided by the Office of the Defense Secretary (OSD), taken Aug. 19, 2014, shows a Chinese fighter jet that the White House said Friday conducted a "dangerous intercept" of a U.S. Navy surveillance and reconnaissance aircraft. Uncredited/AP hide caption

itoggle caption Uncredited/AP

China's President Xi Jinping has launched a number of crackdowns since coming to power, like suppressing Internet speech. But his anti-corruption drive has made him widely popular among ordinary Chinese. Jorge Silva/Reuters/Landov hide caption

itoggle caption Jorge Silva/Reuters/Landov

This handout photo provided by the Office of the Defense Secretary (OSD), taken Aug. 19, 2014, shows a Chinese fighter jet that the White House said Friday conducted a "dangerous intercept" of a U.S. Navy surveillance and reconnaissance aircraft. Uncredited/AP hide caption

itoggle caption Uncredited/AP