Signatures of officials and construction workers are written on the final steel beam to be installed on 4 World Trade Center during a ceremony to mark its installation in New York. (Reuters)

Signatures of officials and construction workers are written on the final steel beam to be installed on 4 World Trade Center during a ceremony to mark its installation in New York. (Reuters)

Long-tailed mayflies fly over the surface of the Tisza river near Tiszainoka, 135km (84 miles) southeast of Budapest, Hungary, June 20, 2012. Millions of these short-lived mayflies engage in a frantic rush to mate and reproduce before they perish in just a few hours during 'Tiszaviragzas' or Tisza blooming season from late spring to early summer every year. (Reuters)

People gather during the summer solstice at Stonehenge, near Salisbury. Rain-sodden crowds welcome a spectacularly rainy summer solstice at Stonehenge in true British fashion. (AP)

Drummers from South Korea perform during a commemoration ceremony in the south Lebanese town of Tayr Dibba, held in honor of all those who fought in the Korean war (1950-1953). (AFP)

Indian employees are evacuated as smoke billows after the Maharashtra state government building caught fire in Mumbai. More than two dozen fire engines battled a major fire that raged for more than three hours in the country's financial and entertainment capital. (AP)

Burma's pro-democracy leader Aung San Suu Kyi (C) smiles as she leaves after addressing both Houses of Parliament, in Westminster Hall, in the Houses of Parliament, central London. (Reuters)

Indonesian military personnel investigate the site where an air force plane crashed, in Jakarta. The Fokker F-27 turboprop plane crashed into homes during a routine training flight in the capital, killing at least six people. (AP)

A boy opens his mouth wide while running through a wall of water at Yards Park in Washington, D.C. Heat index values are expected to exceed 100 degrees Fahrenheit across the northeast, according to the National Weather Service. (AP)

A group of people look at the horizon standing on the rocky crest filled with astronomical markers at the megalithic observatory Kokino in Macedonia, soon after sunrise on the day of the Summer solstice. (AFP)

A man runs on Botafogo beach near a huge sculpture made from plastic bottles, back-dropped by a silhouette of Sugarloaf mountain in Rio de Janeiro, Brazil. (AP)

Participants take part in a mass yoga class to mark the summer solstice on Times Square in New York. (AFP)

An art installation of 857 empty school desks stands at the National Mall, near the Washington Monument, in Washington. Each of the desks represents an American student who drops out every hour of every school day, according to the College Board which set up the installation. (Reuters)

An Afghan refugee girl sits on a jerrycan while other refugees collect water in a slum on the outskirts of Islamabad, Pakistan, on World Refugee Day. (AP)

Tibet's exiled spiritual leader the Dalai Lama and the Dean of Westminster John Hall attend a service entitled 'A Moment of Prayer and Reflection' at Westminster Abbey in central London. (Reuters)

Taxis parked at the compound of a taxi company, after drivers halted their operations to attend a nationwide strike in Seoul, South Korea. Private and public taxi drivers, as well as the management of taxi companies, launched a 24-hour nation-wide strike to demand the government to hike taxi fares and lower the price of gas. (Reuters)

People put together a jigwaw puzzle of a self portrait of Albrecht Duerer in front of the state historical museum in Manezh Square outside the Kremlin in Moscow. The 300-square-meter puzzle will be set up on the occasion of the 'German Year' in Russia. (AP)

Two local residents pick up driftwood as waves crash against the coast in Chung-yun fishing harbour at Linyuan district, in the southern Taiwanese city of Kaohsiung. (AFP)

Former Penn State University assistant football coach Jerry Sandusky arrives at the Center County Courthouse in Bellefonte, Pennsylvania, USA. Sandusky is charged with 51 counts of child sexual abuse involving 10 boys over a period of 15 years. (AP)

A salvage platform floats in front of the wreckage of capsized cruise liner Costa Concordia near the harbor of Giglio Porto, Italy. (Reuters)

A toddy tapper walks on a rope as he crosses between coconut palm trees in order to collect sap to make palm wine, or toddy as it is locally known, in Wadduwa. (AFP)

A man arranges bread on a life-sized model of a tank at Morro Santa Marta, the first 'pacified' favela, ahead of the Rio+20 conference in Rio de Janeiro, Brazil. The installation by the World Future Council organization symbolizes the use of military expenses to fund social needs and calls for the governments taking part in the Rio+20 conference to work towards disarmament for sustainable development. (Reuters)

A man transports fodder on his bullock cart on the outskirts of Faisalabad, Pakistan.

Michael Tikili of New York places a Robin Hood-style hat and mask on a statue of Benito Juarez in Bryant Park, in support of the Robin Hood tax, in New York. The proposed plan would tax stocks, bonds, derivatives and currencies, in an effort to generate more income for the federal budget. (Reuters)

A robot is seen as Buddhist monks walk for a mass alms-offering ceremony at King Mongkut's Institute of Technology Ladkrabang in Bangkok, Thailand. The ceremony was held to mark the 2,600th anniversary of the enlightenment of Lord Buddha. (Reuters)

Public and private residential blocks on a hillside in Hong Kong (Reuters)

A shipyard worker chains himself in front of the government building in Seville in a protest against the economic crisis in Spain. (AFP)

Smoke billows from the High Park Fire west of Fort Collins, Colorado, USA, June 18, 2012. The wildfire has burned about 90 square miles and destroyed more than 180 homes. (AP)

Workers sort palm fruits at a palm oil processing plant in Lebak, Indonesia. (AP)

Flamingos fly over other flamingos in the waters of a reserve at a flamingo valley near the town of Manaure, Guajira province, Colombia. (Reuters)

A Lebanese soldier stands under a national flag as smoke billows from burning tires at the entrance of the Palestinian Ain al-Helweh refugee camp, on the outskirts of the southern Lebanese city of Sidon, during the funeral of a Palestinian, killed in clashes with the army the previous day. (AFP)

Burma's pro-democracy leader Aung San Suu Kyi with singer Bono (L) of the band U2 while she speaks to officials, as she arrives at Dublin airport in Ireland. (Reuters)

Queen Elizabeth II and Prince Philip walk in the grounds of Windsor Castle to attend the annual Order of the Garter Service at St George's Chapel, Windsor Castle, Windsor, England. The Most Noble Order of the Garter, founded in 1348, is the highest order of chivalry existing in England. (AP)

Supporters of the Muslim Brotherhood's presidential candidate Mohamed Morsi celebrate at Tahrir square in Cairo. Egypt's Muslim Brotherhood said its candidate won the country's first free presidential election. (Reuters)

Papuan tribal warriors armed with bows and arrows and improvised shields move into position as tribal clash erupted between two tribes in Kwamki Lama village in Mimika district located in Indonesia's restive Papua province. (AFP)

Supporters from the opposition Nepali Congress party shout slogans during a protest in Katmandu. Hundreds of supporters demanding Prime Minister Baburam Bhattarai's resignation gathered outside the Tribhuwan International Airport in Katmandu and attempted to block his motorcade. (AP)

Kashmiri Muslim women raise their arms after seeing a relic of Prophet Mohammad during Meeraj-un-Nabi celebrations at Hazratbal shrine in Srinagar, India. (Reuters)

Farmers herd a flock of ducks along a street towards a pond as residents drive next to them in Taizhou, Zhejiang province, China, June 17, 2012.

Art work made with wrought iron and jasmine plants, 'Pavillon é', by Portuguese contemporary art painter Joana Vasconcelos, outside the Palace of Versailles, France. The exhibition 'Joana Vasconcelos Versailles', will be running from June 19 to September 30, 2012. Vasconcelos will be the first woman and the youngest artist to show her work in the setting of Versailles. (AFP)

Four-year-old South Sudanese girl Nyot Koang Gai looks out from a bus window as a woman writes 'I Love You' on it, before its departure to Ben Gurion airport from Tel Aviv's central bus station. Israel launched a high-profile deportation drive against African migrants with an airlift of South Sudanese. (Reuters)