Youths parade wearing World War Two uniforms during the Independence Day celebrations in Gdansk November 11, 2014. (Photo by Lukasz Glowala/Reuters/Agencja Gazeta)

People parade in medieval costumes during the Independence Day celebrations in Gdansk November 11, 2014. (Photo by Lukasz Glowala/Reuters/Agencja Gazeta)

Youths parade wearing World War Two uniforms during the Independence Day celebrations in Gdansk November 11, 2014. (Photo by Lukasz Glowala/Reuters/Agencja Gazeta)

People parade wearing military uniforms during the Independence Day celebrations in Gdansk November 11, 2014. (Photo by Lukasz Glowala/Reuters/Agencja Gazeta)

Youths parade wearing World War Two uniforms during the Independence Day celebrations in Gdansk November 11, 2014. (Photo by Lukasz Glowala/Reuters/Agencja Gazeta)

A man pose wearing a pope outfit during the Independence Day celebrations in Gdansk November 11, 2014. (Photo by Lukasz Glowala/Reuters/Agencja Gazeta)

Poland's President Bronislaw Komorowski (C) and his wife Anna walk together with officials during the Independence Day celebrations in Warsaw November 11, 2014. (Photo by Slawomir Kaminski/Reuters/Agencja Gazeta)

A far-right protester holds a flare during the annual far-right rally, which coincides with Poland's National Independence Day in Warsaw November 11, 2014. (Photo by Kacper Pempel/Reuters)

Riot policemen stand next to a water cannon as several hundred masked men who broke away from a far-right march threw stones and flares in Warsaw November 11, 2014. Nationalist groups march through Warsaw each year to mark the anniversary of Polish independence, but for the fourth year in a row the procession turned violent. (Photo by Kacper Pempel/Reuters)

Protesters help each other as police use water cannon to push back several hundred masked men who broke away from a far-right march and threw stones and flares in Warsaw November 11, 2014. (Photo by Malgorzata Gendlek/Reuters/Agencja Gazeta)

Riot policemen detain a protester after several hundred masked men broke away from a far-right march and threw stones and flares in Warsaw November 11, 2014. (Photo by Dariusz Borowicz/Reuters/Agencja Gazeta)

Several hundred masked men threw stones and flares at lines of riot police after they broke away from a far-right march Warsaw November 11, 2014. (Photo by Kacper Pempel/Reuters)

Protesters taunt the police as several hundred masked men broke away from a far-right march and threw stones and flares at lines of riot police in Warsaw November 11, 2014. (Photo by Kacper Pempel/Reuters)

Riot policemen stand beside a water cannon as several hundred masked men who broke away from a far-right march threw stones and flares in Warsaw November 11, 2014. (Photo by Kacper Pempel/Reuters)

Protesters broke a fence as several hundred masked men broke away from a far-right march and threw stones and flares at lines of riot police in Warsaw November 11, 2014. (Photo by Kacper Pempel/Reuters)

A young couple sit on the roof of a building and watch the “March of Independence” marking Polish Independence Day near the National Stadium in Warsaw, Poland, 11 November 2014. Poland's Independence Day, marks the restoration of Poland's independence at the end of the First World War on 11 November 1918, after 123 years of partitions by Austria-Hungary, Prussia, and Russia. (Photo by Pawel Supernak/EPA)