The Observer's 20 photographs of the week

US President Barack Obama speaks at City Park in Denver, Colorado Photograph: Mandel Ngan/AFP

A wounded Syrian youth sits on the back of a truck carrying victims to hospital in Aleppo. Hopes of a truce being implemented in war-torn Syria during this week's Muslim Eid al-Adha holidays are 'slim', the Arab League said, as heavy fighting erupted in Damascus and on northern battlefields Photograph: Fabio Bucciarelli/AFP

In London, window cleaners work on the Shard shrouded in fog Photograph: Yui Mok/PA

A hill is covered in fog in the Alps near Bayrischzell, Germany Photograph: Christof Stache/AFP

An Indian goat herder gives a goat water at an animal market in the Old Quarters of New Delhi ahead of the Muslim feast of Eid al-Adha Photograph: Andrew Caballero-Reynolds/AFP

An Iranian refugee sleeps in front of Brandenburg Gate during a hunger strike in Berlin. Twenty refugees, mainly from Iran and Afghanistan, went on hunger strike demanding an end to deportations, obligatory camp accommodation to be abolished and restrictions on their movements be lifted Photograph: Thomas Peter/Reuters

Adriana Marquez Nava, a Mexican Muslim convert, leaves her parents' home for her wedding as family members look on in Mexico City Photograph: Claudia Daut/Reuters

A Palestinian activist is arrested by Israeli soldiers as dozens of Palestinians block the entrance to a branch of the Rami Levy supermarket opened in the Shaar Binyamin Jewish settlement. The protesters called for a boycott of goods being produced in the settlement Photograph: Ahmad Gharabli/AFP

People collect metal from the rubble in Pauktaw township. Boatloads of Muslims struggled to reach refugee camps after ethnic violence in Rakhine, western Burma Photograph: Soe Zeya Tun/Reuters

Clouds gather over the Saudi holy city of Mecca as seen from the top of Noor Mountain. Photograph: Hassan Ammar/AP

Dyushes, a Don Sphynx cat, stretches on an armchair at the 'Cats Republic' art cafe in St Petersburg. The cafe includes an exhibition area, a library and a separate hall, all with cats living inside Photograph: Alexander Demianchuk/Reuters

Villagers dressed as Eighth Route Army soldiers perform during a large-scale live-action show near two theme parks at Wuxiang, China. Visitors to the theme parks pay to participate in a dress up action play with performers, where they can choose to role play as soldiers from the Japanese army or the Eighth Route Army Photograph: Jason Lee/Reuters

People walk on a street littered with debris after Hurricane Sandy hit Santiago de Cuba Photograph: Desmond Boylan/Reuters

People wash sacrificial rams in the Atlantic Ocean as they prepare for the Eid al-Adha feast in Dakar, Senegal. The festival, known locally as Tabaski, celebrates Abraham's willingness to sacrifice his son Photograph: Rebecca Blackwell/AP

An anti-government protester walks through tear gas during clashes with riot police in Mameer. Seven Bahrainis have been detained in clashes in which a policeman was allegedly killed Photograph: Hamad I Mohammed/Reuters

Joseph lies on a mattress outside a branch of Caja Madrid, part of the Bankia group bailed out by the Spanish state, during a protest against evictions on the Plaza Celenque Photograph: Pedro Armestre/AFP

Two women watch the presidential debate between Barack Obama and Mitt Romney at a laundromat in the Chatsworth area of Los Angeles Photograph: Robyn Beck/AFP

Somalis carry a swordfish and a shark to the market in Mogadishu Photograph: Farah Abdi Warsameh/AP

Displaced children play in a refugee camp near Atma in Syria Photograph: Manu Brabo/AP

A red deer stag looks for food in the bracken after sunrise in Richmond Park. The park is the largest of the capital's Royal Parks and home to 630 red and fallow deer Photograph: Dan Istitene/Getty