24 hours in pictures

Sana'a, Yemen: aupporters of Yemen's former president Ali Abdullah Saleh attend a rally Photograph: Hani Mohammed/AP

Barcelona, Spain: an attendee sleeps as others use their mobile devices in a pavilion at the Mobile World Congress Photograph: Emilio Morenatti/AP

Rome, Italy: nuns wave during the arrival of Pope Benedict XV in St Peter's Square in Vatican City Photograph: Carsten Koall/Getty Images

Aleppo, Syria: a boy works at a car wash Photograph: Reuters

Rajasthan, India: a villager scans her eyes for the unique identification (UID) database system Photograph: Mansi Thapliyal/Reuters

Nairobi, Kenya: toenail painted with the initials of presidential aspirant Uhuru Kenyatta's party, the National Alliance, in the Mathare slum Photograph: Ben Curtis/AP

Baia Mare, Romania: a woman looks out of a window of an apartment block on Horea Street in a slum inhabited by Roma Photograph: Zsolt Czegledi/EPA

Beijing, China: a woman wearing a plastic bag over her head rides along a smog-filled street Photograph: China Daily/Reuters

Bern, Switzerland: Clown Doctor Schmatz and her colleague Doctor Spook of the Theodora foundation wait outside of a sickroom at Insel university's hospital for children Photograph: Pascal Lauener/Reuters

Santo Domingo, Dominican Republic: Dominican Republic army forces take part in a parade Photograph: Orlando Barria/EPA

Belfast, UK: pigeons fly past a mural in the Shankill Road area Photograph: Cathal Mcnaughton/Reuters

Guna Yala, Panama: Women leave after drinking a beverage called Chicha during anniversary celebrations of the Guna Revolution in Ustupu Photograph: Arnulfo Franco/AP

Manila, Philippines: A resident looking at destroyed houses after a fire engulfed a slum area Photograph: Noel Celis/AFP/Getty Images