The Observer's 20 photographs of the week

Twenty Photographs: TOPSHOTS A gendarme attends an acrobatic

A gendarme attends an street acrobatics show in Vallon Pont d'Arc, France Photograph: Jeff Pachoud/AFP

Twenty Photographs: Syrian boys run for cover from mortar in Aleppo

Syrian boys run for cover from mortar attacks on their neighborhood in Aleppo Photograph: Zac Baillie/AFP

Twenty Photographs: Untitled (Bicycle), 1970-73, by William Eggleston

Untitled (Bicycle), 1970-73, by William Eggleston, which is being displayed at Frieze Masters in London. © Eggleston Artistic Trust Photograph: William Eggleston/Cheim & Read, New York

Twenty Photographs: Autumn Colours Start To Show In London

A tourist does a handstand under a tree in Hyde Park, London, where trees are beginning to show their autumnal colours Photograph: Peter Macdiarmid/Getty

Twenty Photographs: A dolphin at an amusement park in Pyongyang, North Korea

A dolphin leaps from the water during a show at a newly-built amusement park in Pyongyang, North Korea Photograph: David Guttenfelder/AP

Twenty Photographs: A Syrian rebel machine gunner sprays government held buildings in Aleppo

A Syrian rebel fires on government-held buildings during a battle in Aleppo Photograph: Zac Baillie/AFP/Getty Images

Twenty Photographs: A flock of geese swim in a branch of Yangtze river in Dongtu, China

Geese swim on the Yangtze river in Dongtu, China Photograph: Jianan Yu/Reuters

Twenty Photographs: NGO worker speaks to people living in wooden boxes in Hong Kong

A woman speaks to people living in wooden boxes in Hong Kong. Twenty-four people live in the block of 'coffin homes', packed into a single apartment of a little over 50 square metres Photograph: Damir Sagolj/Reuters

Twenty Photographs: Buildings at Gendarmenmarkt during Festival of Lights in Berlin

Buildings at the Gendarmenmarkt are illuminated during the opening day of Berlin's festival of lights Photograph: Tobias Schwarz/Reuters

Twenty Photographs: Mount Lokon volcano spews volcanic ash on Sulawesi Island, Indonesia

Mount Lokon spews a giant column of volcanic ash on Sulawesi island, Indonesia Photograph: AFP

Twenty Photographs: Riot police throws tear gas at protester

Riot police fire teargas at protesters during a march in Bogotá, Colombia. Social organisations, peasants, indigenous people, trade unions and students took part in what they dubbed a 'week of indignation' Photograph: Guillermo Legaria/AFP

Twenty Photographs: Record Skydive Aborted Due To Wind

Felix Baumgartner of Austria sits in his capsule in Roswell, New Mexico. He was preparing to attempt a skydive from 23 miles above the Earth, but the attempt had to be aborted because of winds Photograph: Getty

Twenty Photographs: People look from a circular train as it stops at a station in Yangon

A suburban train stops at a station in Rangoon. As Burma opens up, the most immediate noticeable change is the number of new cars on roads dominated by rusty buses and taxis Photograph: Damir Sagolj/Reuters

Twenty Photographs: Rag & Bone owner, 1986/87, by Tom Wood

Compact, 1997, by Tom Wood. His exhibition Men and Women began this week at the Photographers' Gallery in London Photograph: Tom Wood/Courtesy of The Photographers' Gallery

Twenty Photographs: An Afghan boy and a girl ride a donkey in Afghanistan

Two Afghan children ride a donkey down a road near the small town of Baharak, which lies in a fertile valley fed by the Kokcha river Photograph: Roberto Schmidt/AFP

Twenty Photographs: Space Shuttle Endeavour

The space shuttle Endeavour makes its way through a residential area of Los Angeles on it's final journey to the California Science Centre, where it will go on permanent display Photograph: Chris Carlson/AP

Twenty Photographs: Media crews use apartment balconies to cover Merkel visit

Media crews use apartment balconies to cover Angela Merkel's to Athens. The Greek capital went into security lockdown for the German chancellor's visit Photograph: Aris Messinis/AFP