24 hours in pictures

Nairobi, Kenya: A policeman prepares to fire teargas during clashes between police and opposition party supporters in the slum area of Kibera Photograph: Karel Prinsloo/AP

Skagit, US: Local children enjoy the muddy conditions at the Skagit Valley tulip festival Photograph: Andy Rogers/AP

Helsinki, Finland: Conductor Sakari Oramo rehearses with the Finnish Radio Symphony Orchestra Photograph: Marku Ojala /EPA

Tenerife, Spain: An illegal immigrant recovers from his journey to the Canaries, on a boat from Africa Photograph: Manuel Lerida /EPA

Kabul, Afghanistan: Afghan boys at work in a bakery Photograph: Rafiq Maqbool/AP

Washington, US: General David Petraeus, commander of American forces in Iraq, prepares to testify before the Senate armed services committee Photograph: Mark Wilson/Getty

Washington, US: Hillary Clinton whispers to her fellow senator Bill Nelson as the two listen to General Petraeus and the US ambassador to Iraq, Ryan Crocker Photograph: Paul J Richards /AFP

Madrid, Spain: An image of the Spanish television cameraman Jose Couso at a protest in front the US embassy on the fifth anniversary of his death. Couso died in Baghdad after a US tank fired a shell at the Palestine hotel, where many journalists were staying Photograph: Bernat Armangue/AP

Osaka, Japan: Noodle-based products on display at the Nissin instant ramen museum Photograph: Junko Kimura /Getty

Paris, France: Policemen tackle a protester after clashes during a demonstration by several hundred French school students Photograph: Olivier Laban-Mattei /AFP

Mumbai, India: A man washes in the Dharavi slum quarter, said to be Asia's largest Photograph: Uriel Sinai /Getty

Nuremberg, Germany: A Polar bear called Vera swims at the zoo Photograph: Peter Kneffel /EPA

Port-au-Prince, Haiti: UN peacekeepers protect the national palace after Haitians stormed the building, throwing stones and demanding the resignation of their president over soaring food prices Photograph: Ariana Cubillos /AP

Houston, US: The coffin of a US soldier killed in Iraq is transferred to Houston national cemetery Photograph: Eric Kayne /AP

Seville, Spain: A cup floats in a puddle during the first day of the annual April feria, or fair. Strong rain and winds caused the cancellation of some events Photograph: Eduardo Abad /EPA