24 hours in pictures

Mexico City, Mexico: A young person with a heart symbol painted on his chest, attends a Valentine's Day mass meeting. Thousands gathered in Mexico City's central plaza to pucker up for peace and break the world record for the largest number of people kissing at one time Photograph: Claudio Cruz/AP

New York, USA: Children talk to models as they wait to walk the runway during the first ever Barbie Mattel show during fashion week, to celebrate Barbie's 50th anniversary Photograph: Stephen Chernin/AP

Afghanistan: Abdul Wassay walks past an old cemetery where Afghans killed in Soviet air raids are buried, in the village of Ali Mardan Photograph: Ahmad Masood/Reuters

Manila, Philippines: A homeless man creates decorative ornaments resembling plants. The ornaments are made from plastic bottles recovered from the polluted shoreline of Manila Bay. Photograph: John Javellana/Reuters

Bangalore, India: Members of the Indian air force's Sarang helicopter aerobatics team fly in formation at the Yelahanka air force station during the final day of the Aero India 2009 exhibition Photograph: Dibyangshu Sarkar/AFP/Getty Images

Seongnam, South Korea: Rescue workers search for missing persons on a construction site where a building collapsed. Three construction workers were killed and seven others injured when the site in the southern outskirts of Seoul caved in during excavation Photograph: Yonhap/Reuters

Quebec City, Canada: People play with snow during a snow bath at the Carnaval de Quebec Photograph: Mathieu Belanger/Reuters

Henan province, China: Women fill sacks with garlic in a packing shed in the village of Mulou. The farmers used to be able to sell each sack of garlic in 2007 for more than fifty yuan but this year can only fetch five yuan Photograph: David Gray/Reuters

Phnom Penh, Cambodia: Jeam Toeur, right, 50, former battalion security guard at Tuol Sleng, known as prison S21, stirs a boiling pot filled with palm tree juice next to his family in front of his house in Snai village. A UN-backed genocide court will begin the long-awaited trial of Kaing Guek Eav, better known as Duch, the first regime leader to face trial for atrocities committed in the 1970s Photograph: Nicolas Asfouri/AFP/Getty Images

Mitrovica, Kosovo: A miner walks out of the dressing room, as clothes hang to dry from the ceiling at the Trepca mine. The Trepca mines are a loss-making mountain of debt, environmental damage and legal tangles straddling a disputed border between Serbia and Kosovo Photograph: Visar Kryeziu/AP

Werfenweng, Austria: Bianca Jasinski of Austria is pulled by Siberian huskies during the Sled Dog World Championships in Salzburg province Photograph: Heinz-peter Bader/Reuters

Alentejo, Portugal: Augusta Guerreiro, 72, walks with a pitchfork on the hills surrounding her house. Guerreiro is one of the last inhabitants of the increasingly deserted and remote area of Luzianes in Alentejo Photograph: Nacho Doce/Reuters

Prague, Czech Republic: People in costume attend the traditional Mala Strana Carnival festival celebrating the departing winter and forthcoming spring in front of Prague castle Photograph: Michal Cizek/AFP/Getty Images