Activists perform during a campaign marking the World No Tobacco Day in Seoul, South Korea. (AP)

Lightning strikes behind the campanile on the University of Kansas campus in Lawrence, Kansus, USA, May 30, 2012. (AP)

Buddhist monk Thich Tam Man kowtows on a road in the Ninh Binh province, about 90 km (56 miles) south of Hanoi. He started his journey in 2009 from his monastery at Hoang Phap pagoda, near Vietnam's southern Ho Chi Minh city, to Yen Tu mountain, which is about 150 km (93 miles) east of Hanoi. The distance he will travel is about 1800km (1118 miles), and with every step he takes, for 10 hours a day, Tam Man will kneel and pray. He believes that with every prayer he makes, he will be able to atone for his previous mistakes, and pray for world peace. (Reuters)

An opposition activist attends a protest rally to defend Article 31 of the Russian constitution, which guarantees the right of assembly, in Moscow. The sheet of paper attached to the protester's face reads 'I keep silent'. (Reuters)

The 'Council of the Baltic Sea States' leader summit at the Oceaneum in Stralsund, Germany (Reuters)

A construction worker stands on scaffolding at the construction site of a bridge on the outskirts of Jammu. India's annual economic growth slumped in the January-March quarter to a nine-year low of 5.3 percent. (Reuters)

A model takes to the catwalk at the Giorgio Armani fashion show held in Beijing, China. (AP)