A shadow of migrants wait for food in the makeshift refugee camp at the northern Greek border point of Idomeni, Greece

Darko Vojinovic/AP

A shadow of migrants wait for food in the makeshift refugee camp at the northern Greek border point of Idomeni, Greece

Macedonian Army soldiers patrol between the two-line fence set along the border line between Macedonia and Greece, near southern Macedonian town of Gevgelija

Boris Grdanoski/AP

Macedonian Army soldiers patrol between the two-line fence set along the border line between Macedonia and Greece, near southern Macedonian town of Gevgelija

Blue Man Group performs during a media preview in Singapore

Wong Maye-E/AP

Blue Man Group performs during a media preview in Singapore 

U.S. President Barack Obama dances tango during a state dinner hosted by Argentina's President Mauricio Macri at the Centro Cultural Kirchner as part of President Obama's two-day visit to Argentina, in Buenos Aires

Carlos Barria/Reuters

U.S. President Barack Obama dances tango during a state dinner hosted by Argentina’s President Mauricio Macri at the Centro Cultural Kirchner as part of President Obama’s two-day visit to Argentina, in Buenos Aires. 

A man washes his face close to a shelter for refugees and migrants at the port of Piraeus, near Athens, Greece

Reuters/Michalis Karagiannis

A man washes his face close to a shelter for refugees and migrants at the port of Piraeus, near Athens, Greece

The plane carrying Expedition 46 Commander Scott Kelly of NASA is seen as it taxis after landing at Ellington Field after his return to Earth

Joel Kowsky/NASA via Getty Images

The plane carrying Expedition 46 Commander Scott Kelly of NASA is seen as it taxis after landing at Ellington Field after his return to Earth

Refugees walk to a registration camp after crossing the border  Greek-Macedonian near the town of Gevgelija

Dimitar Dilkoff/AFP

Refugees walk to a registration camp after crossing the Greek-Macedonian border near the town of Gevgelija

A woman walks through artwork created by artist Filippo Minelli in his series Silence / Shapes in Somerset House

Kirsty Wigglesworth/AP

A woman walks through artwork created by artist Filippo Minelli in his series Silence / Shapes, in Somerset House courtyard, London

A security guard patrols at a construction site in front of Petronas Twin Tower

Joshua Paul/AP

A security guard patrols at a construction site in front of Petronas Twin Towers, center, in Kuala Lumpur, Malaysia

Soyuz TMA-18M space capsule carrying the International Space Station (ISS) crew members prepares to land in a remote area outside the town of Dzhezkazgan, Kazakhstan

Krill Kudryavtsev/AP

Soyuz TMA-18M space capsule carrying the International Space Station (ISS) crew members prepares to land in a remote area outside the town of Dzhezkazgan, Kazakhstan

A Sotheby's employee stands infront of a series of portraits of the Mitford Sisters during the pre-auction preview of the personal collection of Deborah Cavendish, Duchess of Devonshire at Sotheby's

Justin Setterfield/Getty Images

A Sotheby’s employee stands infront of a series of portraits of the Mitford Sisters during the pre-auction preview of the personal collection of Deborah Cavendish, Duchess of Devonshire at Sotheby’s

A man pushes a baby in a stroller in front of tents at the transit center for refugees near northern Macedonian village of Tabanovce

Boris Grdanoski/AP

A man pushes a baby in a stroller in front of tents at the transit center for refugees near northern Macedonian village of Tabanovce

Opposition party supporters keep warm by a fire as they gather in front of Kosovo's government building in Pristina

Armend Nimani/AFP

Opposition party supporters keep warm by a fire as they gather in front of Kosovo’s government building in Pristina

A woman stands among photos taken of human rights victims during martial law, displayed at an experiential museum inside a military camp in Manila

Ted Aljibe/AFP

A woman stands among photos taken of human rights victims during martial law, displayed at an experiential museum inside a military camp in Manila

A Palestinian man uses a rope to climb over a section of Israel's controversial separation barrier that separates the West Bank city of al-Ram from east Jerusalem

Thomas Coex/AFP

A Palestinian man uses a rope to climb over a section of Israel’s controversial separation barrier that separates the West Bank city of al-Ram from east Jerusalem

A fighter loyal to Libya's internationally recognised government checks a damaged house in Benghazi

Abdullah Doma/AFP

A fighter loyal to Libya’s internationally recognised government checks a damaged house in Benghazi

Health authorities with the help of the Cuban army fumigate against the Aedes aegypti mosquito to prevent the spread of zika, chikungunya and dengue in a street of Havana

Yamil Lage/AFP

Health authorities with the help of the Cuban army fumigate against the Aedes aegypti mosquito to prevent the spread of zika, chikungunya and dengue in a street of Havana

Protesters carry placards outside an Apple store

Steven Senne/AP

Protesters carry placards outside an Apple store in Boston to protest the FBI obtaining a court order that requires Apple to make it easier to unlock an encrypted iPhone used by a gunman in December’s shooting in San Bernardino

An Iraqi soldier stands in an armed vehicle as they are stationed on the Iraqi-Saudi border in Iraq's southern Samawah province

Haidar Hamdani/Getty Images

An Iraqi soldier stands in an armed vehicle as they are stationed on the Iraqi-Saudi border in Iraq’s southern Samawah province

Kosovo police officers weeraing  gas masks inspect the parliament, after tear gas was launched by opposition lawmakers, disrupting the first parliamentary session of the year

Armend Nimani/Getty Images

Kosovo police officers weeraing gas masks inspect the parliament, after tear gas was launched by opposition lawmakers, disrupting the first parliamentary session of the year