A student distributes leaflets during a protest asking for the complete withdrawal of the government’s plans to implement Chinese patriotism classes in Hong Kong. (AFP)

U.S. President Barack Obama (R) and Republican presidential nominee Mitt Romney discuss a point during the second presidential debate in Hempstead, New York, October 16, 2012. (Reuters)

Tunisian journalists goes on strike, piling pressure on the Islamist government they accuse of restricting freedom of speech after a revolt toppled the country’s autocratic leader last year. (Reuters)

An Indonesian man on a boat salvages scrap items in a river choked with trash in Surabaya city in East Java province. (AFP)

A Google technician works on some of the computers in the Dalles, Oregon, data center. Google is opening a virtual window into the secretive data centers that serve as its nerve center. (AP/Google)

A Nepalese farmer thrashes paddy after harvest in Chunnikhel, outskirts of Katmandu. (AP)

A young suspected crack user reacts as she sits inside a van waiting to be taken to a shelter after being removed from the streets near the Parque Uniao slum in Rio de Janeiro, Brazil. A crew of social workers, psychologists and police rounded up drug users found in the streets, and took them to shelters. (AP)

A subscale model of a potential future low-boom supersonic aircraft designed by the Boeing Company is installed for testing in the supersonic wind tunnel at NASA’s Glenn Research Center in Cleveland. (NASA/Michelle M. Murphy)

A mourner cries as the coffin of former king Norodom Sihanouk arrives at the Royal Palace in Phnom Penh, Cambodia. Tens of thousands poured into the capital to witness the procession of the body of Sihanouk, a revered figure who ruled through the triumph of independence to the tragedy of its brutal civil war. (Reuters)

A girl rides her scooter in front of changing autumn leaves in Sheffield Park Gardens near Haywards Heath in southern England. (Reuters)