Katyn massacre
The Polish Central Bank governor, Slawomir Skrzypek, and other members of the Polish government were amongst those onboard. The crash was near Smolensk airport in western Russia. Kaczyński's wife was killed along with him when the Tupolev Tu-154 went down; the trip to Russia was to commemorate the 70th anniversary of the 
, when thousands of Polish prisoners of war and civilians were killed by the Soviets.
Polish President Lech Kaczyński dies as his plane crashes in Russia