The Observer's 20 photographs of the week

The San Fermín fiesta, famous for its bull runs through the streets of Pamplona began this week. Here, crowds take part in the first bull run of the festival, which attracts thousands of tourists despite heavy condemnation from animal rights groups Photograph: Pedro Armestre/AFP

Later on at the Pamplona festival, a fighting cow leaps over revellers into the bullring after the fourth running of the bulls Photograph: Joseba Etxaburu/Reuters

In Barcelona, activists from the pressure group Mortgage Victims' Platform are dragged out of a bank by police after a protest to support a neighbour facing eviction. With 26% unemployment, Spain is struggling to emerge from its second recession in just over three years Photograph: Emilio Morenatti/AP

Wild horses on the run during the Rapa das Bestas event in the Spanish village of Sabucedo, in which hundreds of wild horses are rounded up, trimmed and groomed in the villages of Galicia Photograph: Miguel Vidal/Reuters

Visitors watch water pouring from the Xiaolangdi Reservoir in Jiyuan, China as part of an ongoing programme to wash tons of sediment down the heavily silted Yellow River and out to sea
Photograph: Reuters

At least five people died and 40 were missing after a runaway train carrying crude oil exploded and destroyed the centre of a small Canadian town. This dramatic Reuters photograph shows the fire raging in Lac-Mégantic, Quebec
Photograph: Reuters

After performing at Glastonbury, the Rolling Stones play Hyde Park in London for the first time since the famous 1969 performance that followed the death of former bandmate Brian Jones Photograph: Sarah Lee/Guardian

Andy Murray, the first British male winner of Wimbledon in 77 years, climbs down from the player's box, right, where friends, family and members of his coaching team watched him beat Novak Djokovic Photograph: Julian Finney/Getty

And the day after the victory, David Cameron was evidently delighted to welcome Murray to 10 Downing Street Photograph: Anthony Devlin/PA

Radical cleric Abu Qatada prepares to board a plane at RAF Northolt that will take him to Jordan, having finally lost a protracted battle against deportation to face terrorism charges in his home country Photograph: MoD/Getty

In Egypt, a crackdown against the Muslim Brotherhood saw 51 supporters of deposed president Mohamed Morsi killed in clashes with the military. Manu Brabo, who won a Pulitzer Prize this year for his work in Syria, took this photograph of supporters of Morsi praying in Cairo during Ramadan Photograph: Manu Brabo/AP

An Israeli soldier from the Kfir infantry brigade takes part in urban warfare exercises at the Elyakim army base, which was built to train soldiers in fighting Hezbollah militants Photograph: Jack Guez/AFP

Beyoncé performs on stage during Mrs Carter Show World Tour in Miami, Florida Photograph: Larry Busacca/WireImage/Getty

Three-year-old Ndzelo looks up at a sculpture of former South African president Nelson Mandela in Johannesburg Photograph: Markus Schreiber/AP

A man adds the finishing touches to a huge bonfire in the New Mossley area of Belfast, Northern Ireland. Hundreds of similar fires were lit as part of Protestant Orange Order parades Photograph: Peter Morrison/AP

Reflected in a nearby building, Greenpeace activists climb up the Shard in London, the tallest building in western Europe, as a protest against oil company Shell's drilling in the Arctic Photograph: Sang Tan/AP

A Bosnian woman tries to find the coffin of a relative among 409 newly identified victims of the 1995 Srebrenica massacre. The bodies of the recently identified victims will be transported to the memorial centre in Potocari where they will be buried to mark the anniversary of the killings, in which up to 8,000 Muslim men and boys were murdered and buried in mass graves Photograph: Dado Ruvic/Reuters

Heavy flood waters sweep through Beichuan in China's Sichuan province. Storms sweeping across parts of the country have affected millions, causing landslides and disrupting transport links Photograph: AFP

A good opportunity for some creative photography at the London Aquarium, as the annual health check of all 6,000 creatures there took place this week. Here, supervisor Lucy Buckley measures a baby hermit crab Photograph: Carl Court/AFP

A 39,000 year-old baby woolly mammoth named Yuka from the Siberian permafrost is unveiled at an exhibition in Yokohama in Japan Photograph: Kazuhiro Nogi/AFP