This image released by NASA December 15,...This image released by NASA December 15, 2014 shows the easily recognized boot of Italy, with Sicily at its toe, spread across this panorama taken October 21 by astronauts aboard the International Space Station(ISS). On a clear night looking east, the pattern of night lights shows populations concentrated mainly along the coastlines, but also in the Po River Valley of northern Italy(L). Some of the brightest clusters of lights are Rome and nearby Naples, with island cities of Cagliari on Sardinia and Catania on Sicilynow well-known as the hometown of European Space Agency astronaut Luca Parmitano. The small, dark, circular patch dangerously close to Catania marks the unpopulated slopes of the active volcano Etna. Hazy lights, as over the Po valley and Rome, probably indicate thin clouds above. The island of Malta appears at the lower right. The airglow line is vivid in this night shot. AFP PHOTO / HANDOUT / NASA   == RESTRICTED TO EDITORIAL USE / MANDATORY CREDIT: "AFP PHOTO / HANDOUT / NASA  "/ NO MARKETING / NO ADVERTISING CAMPAIGNS / NO A LA CARTE SALES / DISTRIBUTED AS A SERVICE TO CLIENTS ==Handout/AFP/Getty Images

NASA/AFP/Getty

This image released by Nasa on Monday shows the easily recognised ‘boot of Italy‘, with Sicily at its toe. On a clear night looking east, the pattern of night lights shows populations concentrated mainly along the coastlines.

A supporter of Zaman holds a copy of the...A supporter of Zaman holds a copy of the newspaper behind a Turkish flag during a demostration against the arrest of journalists outside the Istanbul police headquarters on December 15, 2014. The Turkish government faced accusations of eroding democracy and press freedoms after over two dozen people were arrested in raids against media critical of President Recep Tayyip Erdogan. AFP PHOTO / OZAN KOSEOZAN KOSE/AFP/Getty Images

Ozan Koseo/AFP/Getty

Supporter of Turkey’s Zaman demonstrate against the arrest of journalists, outside the Istanbul police headquarters. The Turkish government has been accused of eroding democracy and press freedoms after over two dozen people were arrested in raids against media critical of President Recep Tayyip Erdogan

Union members clash with police in Brussels during a national general strike which was called for by the different unions to protest against austerity measures.

Thierry Roge/AFP/Getty Images

Union members clash with police in Brussels during a national strike, which was called to protest against austerity measures.

An Iranian woman walks past mannequins l...An Iranian woman walks past mannequins locked to a gas pipe in northern Tehran on December 15, 2014. AFP PHOTO/BEHROUZ MEHRIBEHROUZ MEHRI/AFP/Getty Images

Behrouz Mehri/AFP/Getty

An Iranian woman walks past mannequins locked to a gas pipe in northern Tehran on Monday 

Traffic resumes after the last "Occupy" protest site is cleared at a main road at Causeway Bay shopping district in Hong Kong...Traffic resumes after the last "Occupy" protest site is cleared at a main road at Causeway Bay shopping district in Hong Kong December 15, 2014. Hong Kong authorities arrested several pro-democracy activists on Monday as they cleared the last of three protest sites, marking the closure of demonstration camps in the city that have blocked streets for more than two months. REUTERS/Athit Perawongmetha (CHINA - Tags: POLITICS CIVIL UNREST)

Athit Perawongmetha/Reuters

Traffic resumes after the last Occupy protest site is cleared at a retail district in Hong Kong. The authorities arrested several pro-democracy activists on Monday as they cleared the last of three protest sites, marking the end of the demonstrations that have blocked the city’s streets for more than two months.

An Indian elderly man drinks tea to beat the cold early morning in old parts of New Delhi, India, Monday, Dec. 15, 2014. Cold wave conditions have intensified in the capital after scattered rains occurred in some parts of the city on Sunday, according to local reports. (AP Photo/Bernat Armangue)

Bernat Armangue/AP

An elderly man drinks tea to beat the cold early morning in old parts of New Delhi, India 

REUTERS PICTURE HIGHLIGHT...ATTENTION EDITORS - REUTERS PICTURE HIGHLIGHT TRANSMITTED BY 0730 GMT ON DECEMBER 15, 2014    TBW26 - A hostage runs towards a police officer outside Lindt cafe, where other hostages are being held, in Martin Place in central Sydney December 15, 2014. REUTERS/Jason Reed     REUTERS NEWS PICTURES HAS NOW MADE IT EASIER TO FIND THE BEST PHOTOS FROM THE MOST IMPORTANT STORIES AND TOP STANDALONES EACH DAY. Search for "TPX" in the IPTC Supplemental Category field or "IMAGES OF THE DAY" in the Caption field and you will find a selection of 80-100 of our daily Top Pictures.    REUTERS NEWS PICTURES.     TEMPLATE OUT

Jason Reed/Reuters

A hostage runs towards a police officer outside Lindt Chocolat Café, where other hostages were being held, in Martin Place in central Sydney, Australia on Monday 

Austria's Eva-Maria Brem during the second run of the women's World Cup giant slalom in Are, Sweden,  Friday, Dec. 12, 2014. Brem  came third

Marcus Ericsson/TT News/AP

Austria’s Eva-Maria Brem during the second run of the women’s World Cup giant slalom in Are, Sweden on Friday. Brem ended up in third place

A pro-Russian-separatist patrols the street in front of Russian humanitarian trucks in Makiivka (Makeyevka) in Donetsk region, December 12, 2014. According to Russian media, over 50 trucks arrived in Donetsk while another 80 trucks arrived in Luhansk

Maxim Shemetov/Reuters

A pro-Russian-separatist patrols the street in front of Russian humanitarian trucks in Makiivka (Makeyevka) in Donetsk region on Friday