Today in Pictures: May 15

George Washington University graduates Serena Williams and Hannah Raymond struggle against a strong wind as they pose for graduations pictures near the Washington Monument after their commencement ceremony on the National Mall.

Hair is blown by rotor wash from Marine One with President Barack Obama aboard as it lifts from the South Lawn of the White House for the short trip to Andrews Air Force Base. Obama was on his way Rutgers' New Brunswick campus in New Jersey to speak University's 250th Anniversary commencement ceremony.

A surfer rides a wave in Varazze during a day of high swell due to strong winds in north Mediterranean sea.

Lutimar Paes of Brazil prepares for his Men's 800m final during the Ibero-American Athletics championship at the Rio Olympic Stadium in Brazil.

An Israeli girl plays in a water fountain on a hot day near the Tower of David in the Old City of Jerusalem. According to the Israeli Meteorological Service, an intense heatwave has hit the country, with temperatures as high as 111 degrees expected in some areas.

Serena Williams takes a selfie with the trophy after winning the final match of the WTA Tennis Open tournament at the Foro Italico in Rome.

Sniffer dogs search the West Stand after fans are evacuated from the stadium before the English Premier League soccer match between Manchester United and Bournemouth at Old Trafford in Manchester, Britain.

Environmental activists from the group Robin Wood lie in hammocks over tracks leading to the coal-fired power station belonging to Swedish state-owned energy giant Vattenfall, in Schwarze Pumpe, eastern Germany during anti-coal demonstrations. The protests are part of the "Break Free" campaign launched by Greenpeace and other environmentalist groups in countries including the US, Canada and Brazil to oppose the use of fossil fuels.

Indian villagers catch fish in an agricultural field which is inundated by rain waters in Goalpara district of Assam state, India. Continuous pre-monsoon rain has submerged low lying agricultural land for the past several days.

A woman hangs laundry near her tent in front of the wired fence that separates Greece and Macedonia at a makeshift refugee camp on the northern Greek border point of Idomeni. Thousands of stranded refugees and migrants have camped in Idomeni for months after the border was closed.