A still image from a social media video shows a police officer aiming his gun at a protester in Sai Wan Ho, Hong Kong

Passengers are seen silhouetted by the moon as they ride on the Emirates Air Line cable car over the River Thames in London, Britain

A wounded man is attacked during a protest in the Mong Kok area in Hong Kong

Protests against Chile's government in Santiago

Lance Corporal James Duggan, 23, of the United States Marine Corp speaks with Sargent Michael Sulsona, 67, a United States Marine Corp Vietnam War veteran and recipient of a Purple Heart and Bronze Star, before the Veterans Day Parade in Manhattan, New Yo

A man walks past buses burned during a protest after Bolivia's President Evo Morales announced on Sunday that he was resigning, in La Paz

A still image from a social media video shows a police officer aiming his gun at a protester in Sai Wan Ho, Hong Kong