24 hours in pictures

Tripura, India: A border security force soldier stands guard as the sun sets close to Agartala airport. India put its airports on high alert after warnings of possible attacks using hijacked aircraft Photograph: Parthajit Datta/AFP/Getty Images

Shenyang, China: A swimmer takes an early-morning dip in icy water at a park. A Siberian cold front swept across China, with temperatures in the capital, Beijing, plunging below freezing. Thousands of people were stranded on snowbound expressways in the remote far north-west Photograph: Sheng Li/Reuters

Mumbai, India: A Dalit woman looks at statues of BR Ambedkar, an iconic Hindu leader who fought against discrimination on the basis of caste, on the 52nd anniversary of his death Photograph: /EPA

Hor Hamidi, Iraq: A man hunting for birds in the reeds along the shores of Hor Hamidi, 20 miles south of the Souk ak-Shuykh Photograph: Mohammed Sawaf/AFP/Getty Images

Tokyo, Japan: People skating at an outdoor rink Photograph: Yuriko Nakao/Reuters

Philadelphia, USA: President George W Bush meets army cadets before the army-navy football game at Lincoln Financial Field Photograph: Matt Rourke/AP

Athens, Greece: A poster behind a shop window smashed in riots after police shot dead a teenage boy in the Greek capital Photograph: Yiorgos Karahalis/Reuters

Mecca, Saudi Arabia: Muslim pilgrims pray on a rocky hill called the Mountain of Mercy, on the Plain of Arafat. Nearly 3 million pilgrims converged on the holy city of Mecca at the beginning of the hajj pilgrimage Photograph: Hassan Ammar/AP

Goma, Democratic Republic of Congo: A boy blocks the way to get his picture taken at one of the Mugungu camp sites for internally displaced people Photograph: Peter Andrews/Reuters

La Clusaz, France: The moon rises above snow-covered mountains Photograph: Christophe Karaba/EPA

Rome, Italy: Demonstrators during a sit-in at St Peter's Square protesting against the Vatican's opposition to a UN resolution that would decriminalise homosexuality worldwide. France launched an initiative in May calling for the resolution, which is opposed by the Vatican because it might encourage gay marriage Photograph: Andreas Solaro/AFP/Getty Images

Peshawar, Pakistan: Employees inspect wrecked trucks at a Nato terminal. Taliban militants launched a pre-dawn raid, torching 65 trucks carrying supplies for troops in Afghanistan and killing a guard Photograph: Tariq Mahmood/AFP/Getty Images

Virginia, USA: US drug enforcement administration agents simulate a raid in their tactical training facility in Quantico. Since 1987, the DEA has trained more than 19,000 officials to operate safely in clandestine laboratories commonly referred to as meth labs Photograph: Tim Sloan/AFP/Getty Images