In July 2011 , Klich resigned after an official investigation into the 2010 Polish Air Force Tu-154 crash which killed President Lech Kaczyński and all 95 others on board concluded that mistakes by the military pilots were the primary cause of the disaster . Prime Minister Tusk clarified he did not hold Klich responsible for the crash , saying merely that the investigation had recommended swift and wholesale changes which could only be implemented by a new minister , Klich 's deputy , Tomasz Siemoniak
2010 Polish Air Force Tu-154 crash
2010 Polish Air Force Tu-154 crash
Bogdan Klich