World in focus – best photos for August 30, 2016

Rohan Chapman-Davies of Australia competes during the Subaru Australian Mogul Championships in Perisher, Australia. Brendon Thorne / Getty Images

Participants watch the sunset from the Tower of Ascension as approximately 70,000 people gather for the 30th annual Burning Man arts and music festival in the Black Rock Desert of Nevada, US. Jim Urquhart / Reuters

A woman looks at her mobile phone at the entrance of a cinema in Beijing. Wang Zhao / AFP

Chicago Cubs pitcher Jake Arrieta (left) tags out Pittsburgh Pirates outfielder Starling Marte of the Dominican Republic at home plate on a run down in the fifth inning of the MLB baseball game between the Pittsburgh Pirates and the Chicago Cubs at Wrigley Field in Chicago, Illinois. EPA

Riders are pictured alongside a herd of fighting bulls as they come down an incline towards the entrance to the town during the second 'encierro,' or bull run, in the Fiesta de Cuellar, in Castilla y Leon, Spain. The fiesta in Cuella is recognised as one of the oldest in Spain, dating back to 1499. Jim Hollander / EPA

A South Sudanese refugee child looks on as as the United Nations High Commissioner for Refugees visits the Nyumanzi transit centre in Adjumani, north of the capital Kampala. The international community must respond to the refugee crisis caused by fighting in South Sudan in the same way it responded to the crisis in Europe, the UN refugee chief Filippo Grandi said in Uganda. Isaac Kasamani / AFP

Police fire tear gas grenades at supporters of suspendend president Dilma Rousseff holding a demonstration during her impeachment trial in Sao Paulo, Brazil. Rousseff who testified for the first time at her trial urged the Senate in Brasilia to vote against impeaching her denying charges that she fiddled government accounts. Nelson Almeida / AFP

A child holds a placard reading 'Open the border' during a demonstration in support to refugees and migrants in front of Athens municipality building. Thousands of refugees and their supporters marched towards the Athens municipality building and the the offices of the ruling Syriza party, after an attack last week on the housing squat for refugees and migrants. Protesters demanded better protection for the refugees and migrants. AFP

Jack Sock, of the United States, returns a shot to Taylor Fritz, also from the US, during the first round of the US Open tennis tournament in New York. Julio Cortez / AP Photo

A man walks past flags and a vessel model during the preparation for festive ceremonies commemorating the 75th anniversary of the arrival of the first allied Arctic Convoy, codenamed Operation Dervish, at the northern port of the Soviet Union during the Second World War in Arkhangelsk, Russia. Maxim Zmeyev / Reuters

A man adjusts a keffiyeh on a boy's head during a demonstration in support to refugees and migrants in front of Athens municipality building, in Athens. AFP

A look at the best photos from around the world today.