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Israeli Jewish cafe owner Ze'er Avrahami poses in the window of his Israeli cafe "Sababa" in the Prenzlauer Berg district of Berlin, November 7, 2013. November 9th marks the 75th anniversary of the 'Kristallnacht' ('crystal night' or also referred to as 'night of broken glass') when Nazi thugs conducted a wave of violent anti-Jewish pogroms on the streets of Berlin and other cities in 1938. (Photo : Reuters)

A member of a dance performance team performs to cheer on students (not pictured) taking the annual college entrance examinations, in front of an exam hall in Seoul, November 7, 2013. About 650,000 students on Thursday sat for the annual exams that could lead them to one of the country's top universities. In South Korea, there is no higher achievement than to be accepted by a prestigious university. (Photo : Reuters)

A worker reveals the Twitter listing on the floor before the company's IPO at the New York Stock Exchange, November 7, 2013. (Photo : Reuters)

A general view shows curtains erected as protection from snipers loyal to Syria's President Bashar al-Assad in Aleppo's Salaheddine neighbourhood, November 7, 2013. (Photo : Reuters)

Toronto Mayor Rob Ford reacts to a video released of him by local media at City Hall in Toronto, November 7, 2013. (Photo : Reuters)

Former U.S. President Bill Clinton greets Former Secretary of State Madeleine Albright on stage at the Annual Freedom Award Benefit Event hosted by the International Rescue Committee at the Waldorf-Astoria in New York, November 6, 2013. This year's event honored philanthropist and businessman, George Soros. (Photo : Reuters)

A cigarette pack covered in blood is seen outside a barbershop on Seven Mile Road, where the night before a shooting occurred, in Detroit, November 7, 2013. Detroit police confirmed on Thursday that three people died, in addition to eight who were wounded in a shooting incident on the east side of the troubled city a day earlier. The search continues for two suspects who were believed to have fled the scene in two vehicles after the shooting, police said. (Photo : Reuters)

Members of the media and Tokyo Electric Power Co. (TEPCO) employees wearing protective suits and masks walk down the steps of a fuel handling machine on the spent fuel pool inside the No.4 reactor building at the tsunami-crippled TEPCO's Fukushima Daiichi nuclear power plant in Fukushima prefecture, November 7, 2013. (Photo : Reuters)

Novak Djokovic of Serbia hits a return during his men's singles tennis match against Juan Martin del Potro of Argentina at the ATP World Tour Finals at the O2 Arena in London, November 7, 2013. (Photo : Reuters)