The Observer's 20 photographs of the week

Twenty Photographs: A Syrian man carries his wounded daughter outside a hospital in Aleppo

A Syrian man carries his wounded daughter outside a hospital in the northern city of Aleppo Photograph: Marco Longari/AFP

Twenty Photographs: The Australian Ballet perform Pyotr Tchaikovsky's Swan Lake in Melbourne

The Australian Ballet perform Pyotr Tchaikovsky's Swan Lake at the State Theatre in Melbourne Photograph: Paul Jeffers/EPA

Twenty Photographs: A Bahraini Shia woman is detained by riot police in Manama

A Shia protester is detained by riot police during an anti-government demonstration in Bahrain’s capital Manama. 29 people were arrested as protesters marched in the city centre in defiance of a government ban Photograph: Mohammed Al-Shaikh/AFP

Twenty Photographs: Actors re-enact the rise of the Chinese Communist party

Actors perform in a production re-enacting the rise of the Communist party in Jinggangshan, the birthplace of the Chinese revolution which saw Mao Zedong advance to power Photograph: Carlos Barria/Reuters

Twenty Photographs: Masked Palestinians throw stones at Israeli security forces in Shuafat refugee camp, Jerusalem

Masked Palestinians throw stones at Israeli security forces in Shuafat refugee camp, Jerusalem, after a demonstration against the film Innocence of Muslims Photograph: Bernat Armangue/AP

Twenty Photographs: Occupy Wall Street protesters on the streets of New York's financial district

The Occupy Wall Street movement commemorates the first anniversary of its protest in New York's financial district Photograph: Andrew Burton/Reuters

Twenty Photographs: Orthodox Jews mark the Jewish new year in Ukraine

Orthodox Bratslav Hasidic Jews gather near the tomb of Rabbi Nachman in Ukraine to mark the Jewish new year Photograph: Maksim Dondyuk/EPA

Twenty Photographs: Mitt Romney campaigns in Las Vegas

Republican presidential candidate Mitt Romney campaigns in Las Vegas. Romney bowed to sustained pressure from the Democrats this week by releasing a summary of his tax returns for the last two decades Photograph: Charles Dharapak/AP

Twenty Photographs: Meadham Kirchhoff present A Cautionary Tale at London Fashion Week

Designers Meadham Kirchhoff present their elaborate show A Cautionary Tale at London Fashion Week Photograph: Suzanne Plunkett/Reuters

Twenty Photographs: Libyans climb up electricity towers to watch a march against militias in Benghazi

Libyans climb up electricity towers to watch a march in Benghazi against militias, in particular Ansar al-Sharia, which has been blamed for the murder of the US ambassador and three of his colleagues Photograph: Mohammad Hannon/AP

Twenty Photographs: A woman rests after unloading gravel from boats at a port outside Yangon, Burma

A woman in Burma takes a break from unloading gravel from boats at a port outside Yangon, a job that earns three US cents a basket. Burmese opposition leader Aung Sang Suu Kyi began her landmark tour of the US this week Photograph: Damir Sagolj/Reuters

Twenty Photographs: Protesters in central Rome, Italy, demonstrate against the film Innocence of Muslims

Demonstrators in central Rome, Italy, shout against the film ridiculing the prophet Muhammad Photograph: Alessandra Tarantino/AP

Twenty Photographs: Spectators wait by the Golden Gate bridge in San Francisco to see space shuttle Endeavour pass by

Spectators wait by the Golden Gate bridge in San Francisco to see the space shuttle Endeavour pass by on its final journey to the California Science Centre in Los Angeles Photograph: Justin Sullivan/Getty

Twenty Photographs: Members of a Syrian family cry outside a hospital in Aleppo

Members of a Syrian family cry outside a hospital in Aleppo. The Britain-based Syrian Observatory for Human Rights said this week that nearly 30,000 Syrians have been killed during the 18-month uprising against the Assad regime Photograph: Marco Longari/AFP

Twenty Photographs: Man Ray Portraits exhibition

A solarised portrait of Lee Miller which will go on display at the National Portrait Gallery when an exhibition of more than 150 photographs by American artist Man Ray opens in February 2013 Photograph: Lee Miller Archives/Man Ray Trust/PA Wir

Twenty Photographs: Luc Delahaye's photograph 132nd Ordinary Meeting of the Conference, Opec Headquarters, Vienna, 2004

Luc Delahaye's photograph 132nd Ordinary Meeting of the Conference, Opec Headquarters, Vienna, 2004. The photographer has been shortlisted for the Prix Pictet award 2012 Photograph: Prix Pictet/Courtesy of Galerie Nathalie Obadia

Twenty Photographs: The Milky Way arches over a mirror-like lake on the island of Réunion

The Milky Way arches over a lake on the island of Réunion. The photographer Luc Perrot waited two years for the right conditions to take this shot which was highly commended at the Royal Observatory's Astronomy Photographer of the Year awards Photograph: Luc Perrot