24 hours in pictures

Beijing, China: A woman performs morning exercises with fans at Ditan park Photograph: Andy Wong/AP

Chianocco, Italy: Riot police stand guard during a sit-in protest against the construction of a high-speed train line that will link Turin and Lyon Photograph: Giorgio Perrottino/Reuters

Dakar, Senegal: Supporters of the presidential candidate Macky Sall attack and beat a supporter of the incumbent president, Abdoulaye Wade Photograph: Nic Bothma/EPA

Mexico City, Mexico: An activist hangs a placard from a sculpture of Mexican hero Leonardo Bravo during a campaign called Breathing Shouldn't Be Something For Heroes, drawing attention to the problems of pollution Photograph: Yuri Cortez/AFP/Getty Images

Whitley Bay, England: American artist Yvette Mattern's Global Rainbow, which celebrates Martin Luther King Day, lights up the north-east coastline to herald the 2012 Olympic Games Photograph: Owen Humphreys/PA

Khartoum, Sudan: A member of the national weightlifting team prepares to compete with other athletes for a place in the Olympic team Photograph: Mohamed Nureldin Abdallah/Reuters

Allahabad, India: A police officer checks forms as unemployed Indian women crowd the employment exchange office Photograph: Rajesh Kumar Singh/AP

Amman, Jordan: A bee collects pollen from an almond blossom Photograph: Ali Jarekji/Reuters

Tokyo, Japan: A miko, or shrine maiden, walks as snow falls at the Meiji Shrine Photograph: Franck Robichon/EPA

Harveyville, Kansas, US: The damage and wreckage left after a tornado passed through the town Photograph: Mathew Fowler/AP

Paris, France: A model stumbles during French designer Anthony Vaccarello's show at Paris Fashion Week Photograph: Stephane Reix/EPA

Kuala Lumpur, Malaysia: A worker runs for cover during a torrential downpour at a construction site Photograph: Mark Baker/AP

Punta Arenas, Chile: One of two British cruise ships refused entry to an Argentinian port because they had berthed in the Falklands arrives in southern Chile Photograph: Martin Bernetti/AFP/Getty Images

Tehran, Iran: Iranians pray next to the graves of their loved ones at the Beheshte Zahra cemetery Photograph: Majid Saeedi/Getty Images