The Observer's 20 photographs of the week

Photographer Jim Urquhart was at the Burning Man Festival in the Black Rock Desert of Nevada. Here, Pippin, his Playa name, chats on the phone with God. The federal government issued a permit for 68,000 people from all over the world to gather at the festival and spend a week cut off from much of the outside world Photograph: Jim Urquhart/Reuters

And here, in another Jim Urquhart photograph, the Man burns on the penultimate day of the festival Photograph: Jim Urquhart/Reuters

Flames blaze during a wildfire near the village of Barbudo, Spain Photograph: Miguel Riopa/AFP

Justo Marquez, 50, carries a cross during a peace march as he enters the British territory of Gibraltar at its border with Spain. Marquez began his walk from Malaga carrying a sign that reads, 'No more hunger. No more war. Peace in the world' Photograph: Jon Nazca/Reuters

Ultra-Orthodox Jewish men pray next to a woman separated by a fence ahead of the Jewish New Year at the Western Wall in Jerusalem Photograph: Sebastian Scheiner/AP

Masked Palestinian youths prepare to throw stones at Israeli riot police during clashes following Friday prayers at Jerusalem's al-Aqsa mosque Photograph: Ahmad Gharabli/AFP

Intense sunlight is reflected from the glass windows of the new 'Walkie Talkie' tower in London Photograph: Matt Dunham/AP

At the same location, crowds gather as a television crew try to fry an egg from the heat of the reflected sunlight. The concave side wall has been blamed for reflecting the intense sunlight which has damaged cars and bicycles Photograph: Peter Macdiarmid/Getty

Senator John McCain plays poker on his iPhone during a US Senate Committee on Foreign Relations in Washington DC where Secretary of State John Kerry, Secretary of Defense Chuck Hagel, and Chairman of the Joint Chiefs of Staff General Martin Dempsey testified on the use of force in Syria Photograph: Melina Mara/The Washington Post

A Free Syrian Army fighter carrying a weapon looks through the curtains of a bedroom in Deir al-Zor Photograph: Reuters

A grey wagtail attacks his reflection. This photograph won the animal behaviour category at this year's British wildlife photography awards Photograph: Robin Orrow/BWPA/PA

Pancho the Pelican stands on a rocking chair inside the home of Magela Guerrero where he lives in Havana, Cuba. The bird was brought to Guerrero's home two years ago when a neighbour fishing along Havana's Malecon seawall found Pancho close to death. A vet prescribed a regimen of medicine and curative creams, and Guerrero nursed him to recovery Photograph: Ramon Espinosa/AP

Storks fly at the border between Turkey and Syria as they prepare to migrate Photograph: Bulent Kilic/AFP

A hammerhead shark swims close to Wolf Island at Galapagos Marine Reserve Photograph: Jorge Silva/Reuters

A man falls at the 10,000 volt obstacle as he competes in the Tough Viking race in Stockholm. The course consists of 15 brutal obstacles which include barbed wire, ice, tunnels, electricity and fire and was designed by specialists in the Swedish Armed Forces Photograph: Jonathan Nackstrand/AFP

Roger Federer is despondent as he walks off the court after losing to Spaniard Tommy Robredo in the fourth round of the 2013 US Open in New York Photograph: Darron Cummings/AP

Students clash with riot police during a protest to demand educational reform from the Chilean government and to break with other legacies of the dictatorship of Augusto Pinochet ahead of the 40th anniversary of the military coup Photograph: Martin Bernetti/AFP

A police officer inspects the damaged windshield of a police bus after clashes between the police and rubber farmers in Bangsaphan, Thailand. Tens of thousands of farmers in the country's main rubber-producing region are demanding greater state support after a slowdown in demand from China Photograph: Athit Perawongmetha/Reuters

Models are pictured in mirrors as they prepare backstage before the Honor Spring/Summer 2014 collection at New York Fashion Week Photograph: Lucas Jackson/Reuters

Gareth Bale is presented as a Real Madrid player after completing his record-breaking move at Estadio Santiago Bernabeu. He became the world's most expensive footballer after a deal was agreed with Tottenham thought to be worth €100m (£85.3m) Photograph: Gonzalo Arroyo Moreno/Getty