24 hours in pictures

Dakar, Senegal: A supporter of presidential challenger Macky Sall attends a final campaign rally in traditional costume ahead of this weekend's second round of presidential polls Photograph: Finbarr O'Reilly/Reuters

Kfar Kadum, Israel: A Palestinian protester rolls a tyre to burn as a man throws stones towards Israeli soldiers during a protest against the closure of a road by Jewish settlers from the nearby settlement of Kadumim Photograph: Jaafar Ashtiyeh/AFP/Getty Images

Nairobi, Kenya: Members of Amnesty International carry a hot air balloon which reads 'Housing is a Human right' through a Kibera slum. Thousands of slum dwellers from Africa attended a meeting to lobby housing ministers and heads during the African Ministerial Conference on Housing and Development Photograph: Carl De Souza/AFP/Getty Images

Wisconsin, US: An American robin pulls a worm from the ground in a grassy area just north of Zoo beach in Racine Photograph: Scott Anderson/AP

Florida, US: Reverend Al Sharpton leaves a rally for the murdered teenager Trayvon Martin. Sanford police chief, Bill Lee, announced he will temporarily step down after the killing of the unarmed black teenager Photograph: Mario Tama/Getty Images

London, England: A model of a mermaid used in Harry Potter and the Goblet of Fire is displayed at the new Harry Potter Studio Tour at Warner Brothers Leavesden Studios Photograph: Dan Kitwood/Getty Images

Sana'a, Yemen: Supporters of the former Yemeni president Ali Abdullah Saleh put pictures of his face on their daggers during a celebration marking his 70th birthday. Saleh stepped down in February after more than three decades in power and a year of bloody protests calling for his removal Photograph: Hani Mohammed/AP

Dunkerque, France: Benjamin Stasiulis competes in the 200m backstroke at the French swimming championships, where he clocked a national record and a spot at the Olympics Photograph: Philippe Huguen/AFP/Getty Images

Santiago, Cuba: Pedestrians walk along a street in the morning light. Tensions are high between dissidents and the government as activists hope the international exposure of the pope's visit will result in renewed attention to their struggle for greater freedoms Photograph: Spencer Platt/Getty Images

Shandong, China: A man meditates near a statue of a Buddist arhat at a temple fair in Jinan city. The fair is held to welcome the arrival of spring and displays many traditional folk cultures and customs for local people Photograph: Wu Hong/EPA

Multan, Pakistan: A woman and her daughter, who are both victims of acid attacks, pose with family members at their home in Khanwala village. Acid attacks are among the worst forms of domestic violence in Pakistan and mostly directed at women Photograph: Bay Ismoyo/AFP/Getty Images

London, England: Horse riders enjoy the spring sunshine in Hyde Park Photograph: Peter Macdiarmid/Getty Images

Benghazi, Libya: A woman tends to her children in a building that used to be a pro-Gaddafi military base. Poor families in the city are using these spaces as temporary homes Photograph: Asmaa Waguih/Reuters