A Syrian refugee and two children arrive aboard the passenger ferry Ariadne at the port of Piraeus, near Athens, Greece, January 4, 2016.

Alkis Konstantinidis/Reuters

A Syrian refugee and two children arrive aboard the passenger ferry Ariadne at the port of Piraeus, near Athens, Greece

A Yemeni inspects his family's apartment destroyed by airstrikes allegedly carried out by the Saudi-led coalition targeting a neighborhood in Sanaa, Yemen, 04 January 2016. The nine-month conflict in Yemen has escalated dramatically since the Saudi-led coalition started conducting airstrikes against the Houthi rebels in March, with more than 6000 people killed.

Yahya Arhab/EPA

A Yemeni inspects his family’s apartment destroyed by airstrikes carried out by the Saudi-led coalition targeting a neighborhood in Sanaa, Yemen on Monday

A relative looks at the demolished house of Palestinian Bahaa Mohammed Halil Allyan in the Arab east Jerusalem neighbourhood of Jabel Mukaber on Monday

Ammar Awad/Reuters

A relative looks at the demolished house of Palestinian Bahaa Mohammed Halil Allyan in the Arab east Jerusalem neighbourhood of Jabel Mukaber on Monday

People look around ice sculptures ahead of the Harbin International Ice and Snow Festival in the northern city of Harbin, Heilongjiang province, January 4, 2016.

Aly Song/Reuters

People look around ice sculptures ahead of the Harbin International Ice and Snow Festival in the northern city of Harbin, Heilongjiang province on Monday

A motor boat sails along the Yenisei River, with the air temperature at about minus 20 degrees Celsius (minus 4 degrees Fahrenheit), outside the Siberian city of Krasnoyarsk, Russia, on Tuesday

Ilya Naymushin/Reuters

A motor boat sails along the Yenisei River, with the air temperature at about minus 20 degrees Celsius (minus 4 degrees Fahrenheit), outside the Siberian city of Krasnoyarsk, Russia, on Tuesday

People chant slogans during a protest against security operations against Kurdish rebels in southeastern Turkey cities Cizre and Silopi, in Sirnak on December 22, 2015

Bulent Kilic/AFP

People chant slogans during a protest against security operations against Kurdish rebels in southeastern Turkey cities Cizre and Silopi, in Sirnak on Tuesday

A Chinese woman wearing mask walks in a shopping street during a hazy day in Beijing city, China, on Tuesday.  Beijing issued a red alert for smog, urging schools to close and residents to stay indoors for the second time in 10 days. Restrictions

Wu Hong/EPA

A Chinese woman wearing a mask walks in a shopping street during a hazy day in Beijing city, China, on Tuesday. Beijing issued a red alert for smog, urging schools to close and residents to stay indoors for the second time in 10 days

A Kashmiri Muslim woman peels off the bark of wicker sticks on the outskirts of Srinagar, the summer capital of Indian Kashmir, 22 December 2015. Wicker sticks are used to make Kangir, the traditional Kashmiri firepot, which is used to keep warm during cold winters. Hundreds of families in Kashmir depend on the trade with Kangir, with Kangir artisans of different regions making distinct and fashionable firepots.

Farooq Khan/EPA

A Kashmiri Muslim woman peels off the bark of wicker sticks on the outskirts of Srinagar, the summer capital of Indian Kashmir, on Tuesday. Wicker sticks are used to make Kangir, the traditional Kashmiri firepot, which is used to keep warm during cold winters

People walk across Red Square, with St. Basil's Cathedral seen in the background, in central Moscow on December 22, 2015. The temperatures in the Russian capital reached today 6 C (42 F)

Vasily Maximov/AFP

People walk across Red Square, with St. Basil’s Cathedral seen in the background, in central Moscow on Tuesday. The temperatures in the Russian capital reached as low as 6 C (42 F)

People gather at Stonehenge in Wiltshire on the Winter Solstice to witness the sunrise on the shortest day of the year. PRESS ASSOCIATION Photo. Picture date: Tuesday December 22, 2015

Ben Birchall/PA

People gather at Stonehenge in Wiltshire on the Winter Solstice to witness the sunrise on the shortest day of the year on Tuesday

South Korean workers are seen from a crane as they work on the 123rd floor during the framing completion ceremony of the 'Lotte World Tower' in Seoul, South Kora, on Tuesday. The building's exterior was completed in a final height of 550 meters, and 123 floors

Jeon Heon-Kyun/EPA

South Korean workers are seen from a crane as they work on the 123rd floor during the framing completion ceremony of the ‘Lotte World Tower’ in Seoul, South Kora, on Tuesday. The building’s exterior was completed in a final height of 550 meters, and 123 floors

Rescuers search for potential survivors following a landslide at an industrial park in Shenzhen, in south China's Guangdong province, Tuesday, Dec. 22, 2015.  Authorities blamed an enormous, man-made mountain of soil and waste for the collapse of nearly three dozen buildings that left 81 people missing in southern China's most prominent manufacturing city. Rescuers excavating the mud-drenched mess pulled out one body early Tuesday, the landslide's first confirmed death

Andy Wong/AP

Rescuers search for potential survivors following a landslide at an industrial park in Shenzhen, in south China’s Guangdong province, Tuesday

Choristers from the Salisbury Cathedral Choir practice ahead of the services that will be held in the cathedral marking Christmas Eve on Monday in Salisbury, England. Christmas has been celebrated in the cathedral for over 750 years since it was dedicated in 1258. It is thought that the foundation of the choir stretches back even further, with evidence of a song school in Salisbury as early as the 11th century.

Matt Cardy/Getty Images

Choristers from the Salisbury Cathedral Choir practice ahead of the services that will be held in the cathedral marking Christmas Eve on Monday in Salisbury, England. Christmas has been celebrated in the cathedral for over 750 years since it was dedicated in 1258

Students cling to a fence as they occupy the Finance Ministry in downtown Santiago, December 21, 2015. Student protesters occupied the building as part of a protest demanding changes in the education system

Carlos Vera/Reuters

Students cling to a fence as they occupy the Finance Ministry in downtown Santiago, on Monday. Student protesters occupied the building as part of a protest demanding changes in the education system

An elevation in the city of Sarajevo, Bosnia and Herzegovina, covered in a thick layer of fog, on Monday. Due to high levels of NO2 (nitrogen dioxide) in the air over the city and a certain meteorological condition, residents of Sarajevo were recommended to reduce their movement in the streets and to reduce car traffic

Fehim Demir/EPA

An elevation in the city of Sarajevo, Bosnia and Herzegovina, covered in a thick layer of fog, on Monday. Due to high levels of NO2 (nitrogen dioxide) in the air over the city and a certain meteorological condition, residents of Sarajevo were recommended to reduce their movement in the streets and to reduce car traffic

TOPSHOT - Russian Communist party supporters hold portraits of Soviet dictator Joseph Stalin as they take part in a ceremony to mark the 136th anniversary of his birth at Red Square in Moscow on December 21, 2015.

Vasily Maximov/AFP

Russian Communist party supporters hold portraits of Soviet dictator Joseph Stalin as they take part in a ceremony to mark the 136th anniversary of his birth at Red Square in Moscow on Monday

A colourful sky before sunrise on Whitley Bay beach, as December could be the mildest across a large part of England since records began more than 350 years ago

Owen Humphreys/PA

A colourful sky before sunrise on Whitley Bay beach, as December could be the mildest across a large part of England since records began more than 350 years ago

A child looks at window cleaners work while dressed in sheep and monkey costumes, denoting animal signs of the Chinese zodiac calendar, during an event marking the upcoming end of the year at a hotel in Tokyo, Japan, on Monday. According to the zodiac calendar, 2015 is the year of the sheep and 2016 is the year of the monkey

Thomas Peter/Reuters

A child looks at window cleaners work while dressed in sheep and monkey costumes, denoting animal signs of the Chinese zodiac calendar, during an event marking the upcoming end of the year at a hotel in Tokyo, Japan, on Monday

Druze women mourn their relatives Farhan al-Shaalan and Samir Kantar, who were killed from an Israeli airstrike near the Syrian capital, in the Druze village of Ein Kinya in the Israeli controlled Golan Heights, near the border with Syria. Kantar, a Lebanese who was convicted of carrying out one of the most notorious attacks in Israeli history and spent nearly three decades in an Israeli prison, has been killed by an Israeli airstrike near the Syrian capital, the Lebanese Shiite Hezbollah group said Sunday. Al-Mayadeen said that al-Shaalan, a senior commander with the anti-Israeli  resistance  movement in the Golan Heights, was also killed in the air raid together with an aide to Kantar

Ariel Schalit/AP

Druze women mourn their relatives Farhan al-Shaalan and Samir Kantar, who were killed from an Israeli airstrike near the Syrian capital, in the Druze village of Ein Kinya in the Israeli controlled Golan Heights, near the border with Syria

Rescue workers search for survivors in the aftermath of a landslide in Shenzhen in southern China's Guangdong province Monday. The massive landslide buried dozens of buildings when it swept through an industrial park in the Chinese city

China Photo/AP

Rescue workers search for survivors in the aftermath of a landslide in Shenzhen in southern China’s Guangdong province Monday. The massive landslide buried dozens of buildings when it swept through an industrial park in the Chinese cit