Auschwitz survivor Miroslaw Celka walks out the gate with the sign saying "Work makes you free" after paying tribute to fallen comrades at the "death wall" execution spot in the former Auschwitz concentration camp in Oswiecim, Poland, on the 70th anniversary of the liberation of the Nazi death camp on January 27, 2015. Seventy years after the liberation of Auschwitz, ageing survivors and dignitaries gather at the site synonymous with the Holocaust to honour victims and sound the alarm over a fresh wave of anti-Semitism.

Odd Andersen/AFP

Auschwitz survivor Miroslaw Celka walks out the gate with the sign saying “Work makes you free” after paying tribute to fallen comrades at the “death wall” execution spot in the former Auschwitz concentration camp in Oswiecim, Poland, on the 70th anniversary of the liberation of the Nazi death camp on Tuesday

Commuters make their way in New York's Times Square during a snow storm. A winter storm pounded the northeastern United US on Monday hitting tens of millions of people and forcing the rare cancelation of Broadway shows in an "historic" New York blizzard. Winter Storm Juno is expected to dump up to three feet (around a meter) of snow in parts of the northeast, with the worst affected areas likely to be New England, particularly Connecticut and Massachusetts. More than 6,560 flights on Monday and Tuesday were cancelled, the New York city transit system was to shut at 11pm and road travel made a criminal offense in 13 counties of New York state.

Jewel Samad/AFP

Commuters make their way across New York’s Times Square during a snow storm. Storms have pounded the northeastern US hitting tens of millions of people and forcing the rare cancellation of Broadway shows.

National Army Museum Launches  Its Commemorations For The Bicentenary Of The Battle Of Waterloo...LONDON, ENGLAND - JANUARY 27:  Members of the Napoleonic Association pose for photographs during a press call at Wellington Arch on January 27, 2015 in London, England. The photocall marked the launch of the Waterloo200.org website which is in conjunction with the events marking the bicentennial of the Battle of Waterloo this year.  (Photo by Dan Kitwood/Getty Images)

Dan Kitwood/Getty

Members of the Napoleonic Association pose for photographs during a press call at Wellington Arch in London. The photocall marked the launch of the Waterloo200.org website in conjunction with the events marking the bicentennial of the Battle of Waterloo 

Swans swim over a lake as steam ascends above the water during sunset near the village of Urozhainy, Sovetsky district of Altai region...Swans swim over a lake, with the air temperature at about minus 35 degrees Celsius (minus 31 degrees Fahrenheit) as steam ascends above the water during sunset near the village of Urozhainy, Sovetsky district of Altai region, January 26, 2015. About 600 swans annually migrate to the lake, which is heated by warm springs, where they spend their winter being fed by yagers, which help them to survive the severe cold. Picture taken January 26, 2015. REUTERS/Andrei Kasprishin (RUSSIA - Tags: ANIMALS ENVIRONMENT)

Andrei Kasprishin/Reuters

Swans on a lake near the village of Urozhainy, in the Sovetsky district of the Altai region of Russia. The air temperature is minus 35 degrees Celsius. The swans migrate annually to the lake, which is heated by warm springs, where they spend the winter.

Famine in Pakistan...epa04587737 A child affected from famine waits to get medical treatment in Tharparkar, Sindh province, Pakistan, 27 January 2015. Reports state that some 47 people, most of them infants, died in January due to malnutrition in the famine-hit area of the Sindh province.

Rehan Khan/EPA

A child affected by the famine waits to get medical treatment in Tharparkar, Sindh province, Pakistan. Reports state that about 47 people, most of them infants, died in January of malnutrition. 

A model presents a creation by Belgian designer Raf Simons as part of his Haute Couture Spring Summer 2015 fashion show for French fashion house Christian Dior in Paris...A model presents a creation by Belgian designer Raf Simons as part of his Haute Couture Spring Summer 2015 fashion show for French fashion house Christian Dior in Paris January 26, 2015.    REUTERS/Gonzalo Fuentes (FRANCE  - Tags: FASHION)

Gonzalo Fuentes/Reuters

A model presents a creation by Belgian designer Raf Simons as part of his Haute Couture Spring Summer 2015 fashion show for French fashion house Christian Dior in Paris

Relatives of Alexander Demyanenko, a victim of Saturday's shelling, stand near a grave during funerals in Mariupol, Ukraine, on Monday Jan. 26, 2015. At least 5,100 people have been killed in eastern Ukraine since fighting began in April, but violence this week was the most intense since a cease-fire deal was signed in September.

Evgeniy Maloletka/AP

Relatives of Alexander Demyanenko, a victim of Saturday’s shelling, stand near a grave during funerals in Mariupol, Ukraine, on Monday. At least 5,100 people have been killed in eastern Ukraine since fighting began in April, but violence this week was the most intense since a cease-fire deal was signed in September

Massive star explosion in the Large Magellanic Cloud...epa04586376 A undated handout image made available by NASA on 26 January 2015 showing an expanding shell of debris called SNR 0519-69.0 is left behind after a massive star exploded in the Large Magellanic Cloud, a satellite galaxy to the Milky Way. Multimillion degree gas is seen in X-rays from Chandra, in blue. The outer edge of the explosion (red) and stars in the field of view are seen in visible light from the Hubble Space Telescope. Chandra X-ray Center is releasing a set of images that combine data from telescopes tuned to different wavelengths of light.  EPA/NASA / CXC / SAO  HANDOUT EDITORIAL USE ONLY

Nasa/EPA

This Nasa image shows an expanding shell of debris left behind after a massive star exploded in the Large Magellanic Cloud, a satellite galaxy to the Milky Way. Multimillion degree gas is seen in X-rays from Chandra, in blue. The outer edge of the explosion (red) and stars in the field of view are seen in visible light from the Hubble Space Telescope. 

A procession of clergy make their way into York Minster on January 26, 2015 in York, England. The Reverend Libby Lane, who has been the vicar of St Peter's Hale and St Elizabeth's Ashley, in Greater Manchester, will be ordained as the new Bishop of Stockport in a two hour service led by the Archbishop of York, Dr John Sentamu.  (Photo by Jeff J Mitchell/Getty Images)

Jeff J Mitchell/Getty

A procession of clergy make their way into York Minster in York ahead of the ordination of the Reverend Libby Lane, who became the Church of England’s first woman bishop. 

An Iraq fan waits in the rain for the start of their Asian Cup semi-final soccer match against South Korea at the Stadium Australia in Sydney January 26, 2015.

Edgar Su/Reuters

An Iraq fan waits in the rain for the start of the Asian Cup semi-final football match against South Korea at the Stadium Australia in Sydney

An Indian boy carries recyclable materials past greater adjutant storks at a garbage dumping site on the outskirts of Gauhati, India, Monday, Jan. 26, 2015. The White House is hoping that the surprise deal with China late last year setting ambitious targets for cutting greenhouse gas emissions will influence India and others. Heavy reliance on fossil fuels has transformed New Delhi into the planet's most polluted capital and made India the third biggest national emitter of greenhouse gases.

Anupam Nath/AP

A boy carries recyclable materials past greater adjutant storks at a garbage dumping site on the outskirts of Gauhati, India

Strike in Bangladesh ...epa04585515 A woman sleeps with her child at the platform during the country wide strike called by the Bangladesh Nationalist Party (BNP) at the Kamlapur railway station in Dhaka, Bangladesh, 26 January 2015. Violence erupted in different parts of the country after former prime minister Khaleda Zia called a nationwide transport blockade on 05 January, the first anniversary of a controversial election that her Bangladesh Nationalist Party (BNP) and allies boycotted. According to official estimates, at least 30 people have since been killed in firebomb attacks on passenger buses, cars and trucks as vehicles plied on highways in defiance of the blockade

Abir Abdullah/EPA

A woman and child on the platform at the Kamalapur railway station in Dhaka, Bangladesh, during a country-wide strike called by the Bangladesh Nationalist party 

A girl plays with a curtain of water at Madureira park in Rio de Janeiro, Brazil, on January 25, 2014.  AFP PHOTO / YASUYOSHI CHIBAYASUYOSHI CHIBA/AFP/Getty Images

Yasuyoshi Chiba/AFP/Getty Images

A girl plays in a curtain of water at Madureira park in Rio de Janeiro, Brazil

Indian policeman performs a stunt on motorcycle during the Republic Day parade in Jammu...An Indian policeman performs a stunt on his motorcycle during the Republic Day parade in Jammu January 26, 2015. India celebrated its 66th Republic Day on Monday. REUTERS/Mukesh Gupta

Mukesh Gupta/Reuters

A policeman performs a stunt on his motorcycle during a Republic Day parade in Jammu, India 

TOPSHOTS Syriza leader Alexis Tsipras gr...TOPSHOTS Syriza leader Alexis Tsipras greets supporters following victory in the election in Athens on January 25, 2015. The left-wing Syriza party led by Alexis Tsipras won Greece's general election  after campaigning on a pledge to renegotiate the country's international bailout and reverse years of spending cuts and painful economic reforms.  AFP PHOTO / ARIS MESSINISARIS MESSINIS/AFP/Getty Images

Aris Messinis/AFP/Getty

Syriza leader Alexis Tsipras greets supporters in Athens after victory in the Greece’s election. The leftwing Syriza party won after campaigning on a pledge to renegotiate the country’s international bailout and reverse years of spending cuts and painful economic reforms

Mourners gather around the grave of Saudi King Abdullah following his burial in Riyadh January 23, 2015.  Saudi King Salman pledged on Friday to maintain existing energy and foreign policies then quickly moved to appoint younger men as his heirs, settling the succession for years to come by naming a deputy crown prince from his dynasty's next generation. King Abdullah, who died early on Friday after a short illness, was buried in an unmarked grave in keeping with local religious traditions. REUTERS/Faisal Al Nasser (SAUDI ARABIA - Tags: ROYALS OBITUARY POLITICS)

Faisal Al Nasser/Reuters

Mourners gather around the grave of Saudi King Abdullah following his burial in Riyadh. Saudi King Salman pledged on Friday to maintain existing energy and foreign policies then quickly moved to appoint younger men as his heirs, settling the succession for years to come by naming a deputy crown prince from his dynasty’s next generation. King Abdullah, who died early on Friday after a short illness, was buried in an unmarked grave in keeping with local religious traditions. 

Jock VI, the current cat in residence at Chartwell, on a memorial bench during a preview of  Death of a Hero  exhibition at Winston Churchill's Chartwell family home. PRESS ASSOCIATION Photo. Picture date: Friday January 23, 2015.  The National Trust's Chartwell is commemorating the 50th anniversary of his death with the exhibition.

Gareth Fuller/PA

Jock VI, the current cat in residence at Chartwell, on a memorial bench during a preview of Death of a Hero exhibition at Winston Churchill’s Chartwell family home on Friday. The National Trust’s Chartwell is commemorating the 50th anniversary of his death with the exhibition

Palestinian boys attend Friday prayers as they sit at the remains of a house that witnesses said was destroyed by Israeli shelling during a 50-day war last summer, in the Shejaia neighbourhood east of Gaza City January 23, 2015.

Suhaib Salem/Reuters

Palestinian boys attend Friday prayers as they sit at the remains of a house that witnesses said was destroyed by Israeli shelling during a 50-day war last summer, in the Shejaia neighbourhood east of Gaza City

A general view shows the ODI tri-series cricket match between Australia and England in the field as the sun sets at Bellerive Oval in Hobart...A general view shows the One Day International (ODI) tri-series cricket match between Australia and England in the field as the sun sets at Bellerive Oval in Hobart, Tasmania January 23, 2015. REUTERS/Hamish Blair

Hamish Blair/Reuters

A general view shows the One Day International (ODI) tri-series cricket match between Australia and England in the field as the sun sets at Bellerive Oval in Hobart, Tasmania 

Lotte Smiseth Sejersted of Norway  clears a gate during the final training run for the women's Alpine Skiing World Cup downhill race in St Moritz January 23, 2015.

Arnd Wiegmann/Reuters

Lotte Smiseth Sejersted of Norway clears a gate during the final training run for the women’s Alpine Skiing World Cup downhill race in St Moritz on Friday