24 hours in pictures

Houston, US: A boy inspects an assault rifle during the NRA annual meeting and exhibits at the George R Brown convention centre in Texas Photograph: Justin Sullivan/Getty Images

Bucharest, Romania: Orthodox Christians holds candles inside to the ossuary at the Pasarea monastery near the Romanian capital Photograph: Daniel Mihailescu/AFP/Getty Images

Aproz, Switzerland: Two herens cows lock horns during the qualification round of the annual 'Battle of the Queens' finals Photograph: Valentin Flauraud/Reuters

Churchill Downs, US: Desirae Masterson wears a plastic bag over her hat to protect the feathered headpiece from the rain, during the 139th Kentucky Derby Photograph: David Goldman/AP

Manila, Philippines: A transvestite walks inside a decorated arch for the 'Flores de Mayo', a religious festival celebrating the Virgin Mary Photograph: Cheryl Ravelo/Reuters

Hidden Valley, US: Members of a handcrew, wildland firefighters, rest on a hillside in California after tackling wildfires Photograph: Ringo H.W. Chiu/AP

Biere, Switzerland: Participants in fancy dress navigate a car during the first extreme Barjot Run Photograph: Laurent Gillieron/EPA

Pahang, Malaysia: A supporter of Malaysia's opposition Pan-Malaysian Islamic party (Pas) waves the party's flag ahead of the upcoming general elections Photograph: Lai Seng Sin/AP

Karachi, Paksitan: Supporters of the Pakistan Muslim League-Functional party ride on camels and in vehicles during election campaigning Photograph: Athar Hussain/Reuters

Yunnan, China: A man wears a face mask with the words 'No to Kunming PX' on the front, as he and others take part in a protest against the chemical paraxylene Photograph: AP

Lalibela, Ethiopia: Orthodox Christians read bibles as they pray in front of one of the 11 monolithic rock-hewn churches in the town ahead of Easter Sunday Photograph: Goran Tomasevic/Reuters

Detroit, US: The singer Taylor Swift performs in front of more than 48,000 fans Photograph: Christopher Polk/TAS/Getty Images