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The day the Empire State Building opened – level 3
01-05-1931The construction of the Empire State Building began in 1930. It...
The day of the Smolensk air disaster – level 2
10-04-2010On April 10, 2010, a Polish plane was flying to Russia....
The day of the Smolensk air disaster – level 3
10-04-2010On April 10, 2010, a Polish government plane headed to Russia...
