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WARSAW, POLAND - APRIL 15: The coffin of late Polish President Lech Kaczynski lies in state at the Presidential Palace on April 15, 2010 in Warsaw, Poland. Thousands of mourners from all over Poland stood for hours in a line that stretched at least a kilometer long to view the coffins of Kaczynski and his wife Maria. Kaczynski, his wife and leading members of the Polish military, government and the arts were killed when the presidential plane they were traveling in crashed while attempting to land at Smolensk, Russia, on April 10. The Kaczysnkis are to be buried at Wawel Castle in Cracow in a ceremony scheduled for Sunday. (Photo by Sean Gallup/Getty Images)

WARSAW, POLAND - APRIL 15:  The coffin of late Polish President Lech Kaczynski lies in state at the Presidential Palace on April 15, 2010 in Warsaw, Poland. Thousands of mourners from all over Poland stood for hours in a line that stretched at least a kilometer long to view the coffins of Kaczynski and his wife Maria. Kaczynski, his wife and leading members of the Polish military, government and the arts were killed when the presidential plane they were traveling in crashed while attempting to land at Smolensk, Russia, on April 10. The Kaczysnkis are to be buried at Wawel Castle in Cracow in a ceremony scheduled for Sunday.  (Photo by Sean Gallup/Getty Images)