Katyn massacre
The couple were travelling to Russia to mark the 70th anniversary of the 
 when their plane clipped trees and crashed in Smolensk, Russia. The couple died along with many other senior politicians and military commanders. Other victims included the president of the central bank of Poland, the head of the Polish Olympic Committee and last President of Poland, from the Polish government-in-exile which existed in London during the Nazi and Communist period, Ryszard Kaczorowski. 
Polish president and first lady lie in state ahead of funeral