Valentina Lopatyuk, 79, cries at the grave of her son Viktor Lopatyuk, 29, at the Mitino Cemetery Memorial, for those who died after the Chernobyl 1986 nuclear disaster, in Moscow. Russians marked the 26th anniversary of the Chernobyl nuclear disaster, which was the world's worst ever nuclear accident. (AP)

Horsemen wearing traditional Libyan clothes ride their horses at a wedding in Sauq Al-Sibet, about 45 km (28 miles) south of the capital of Tripoli. (Reuters)

Sunflowers forming to the letter 'G' and roses lie on the stairs of the Gutenberg High School during a commemoration ceremony in memory of the victims at the 10th anniversary of the deadly massacre in Erfurt, Germany. The 19-year-old Robert Steinhaeuser fatally shot 12 teachers, a secretary, two students and a police officer before turning the gun against himself on April 26, 2002. (AP)

The Church of Pokrov on Nerli is surrounded by floodwaters near the village of Bogolyubovo, some 190 km (118 miles) east of Moscow, Russia. (Reuters)

People place flowers near the entrance of a courthouse in Oslo where the trial of Norwegian anti-Muslim fanatic Anders Behring Breivik takes place. (Reuters)

A Turkish folkloric group performs traditional music in Tripoli, northern Lebanon during an annual ceremony to commemorate the 723rd anniversary of the liberation of the city from the Crusaders by the Mamluks. (Reuters)

An Afghan woman beggar sleeps next to two children on a road in the city of Jalalabad, the capital of Nangarhar province east of Kabul, Afghanistan. (AP)

India's PSLV C-19 lifts off carrying country's first indigenous radar imaging satellite RISAT-1 at the Satish Dhawan Space Centre in Sriharikota, India. (AP)