A march commemorating the victims of the 2010 Smolensk airplane crash on April 10, 2015 in Warsaw, Poland. On 10 April, 2010 a Tupolev Tu-154M aircraft of the Polish Air Force crashed in Smolensk, Russia, killing all 96 people on board, including President <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Lech+Kaczynski&family=editorial&specificpeople=544054 ng-click='$event.stopPropagation()'>Lech Kaczynski</a> and his wife Maria.