April 10
Apr 10
2010 Polish Air Force Tu-154 Crash (Smolensk Air Disaster)
On April 10, 2010, a Polish Air Force Tupolev Tu-154M carrying President Lech Kaczyński and 95 others crashed in dense fog near Smolensk, Russia, killing all aboard. The passengers were en route to a 70th-anniversary commemoration of the Katyn massacre. The disaster plunged Poland into mourning, upended its leadership, and led to prolonged investigations, reforms, and controversy that continue to reverberate in Polish-Russian relations.
Apr 10
The Sinking of USS Thresher (SSN-593)
On April 10, 1963, the U.S. Navy nuclear submarine USS Thresher was lost with all hands during deep-diving tests off Cape Cod, triggering the deadliest submarine disaster in American history and transforming naval safety protocols for generations.
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