The investigation in Russia did not remain questions about the reasons for the crash of Kaczynski, version the Polish side of the explosion has not been confirmed, said the official authorized SC of Svetlana Petrenko." To the tragedy caused by a combination of factors. This And the failure of the commander of the crew activities in a timely manner for the alternate care When the actual weather conditions at the airport in Smolensk. And erroneous actions of the crew in the face of declining out-of-sight landmarks, the continuation of the landing, and the lack of adequate response And action required the repeated intervention of the system of early ground proximity warning ",