Before he became president , he was also a member of the Law and Justice party . He was the identical twin brother of the former Prime Minister of Poland and current Chairman of the Law and Justice party , Jarosław Kaczyński . On 10 April 2010 , he died in the crash of a Polish Air Force jet that occurred on a landing attempt at Smolensk North Airport in Russia
crash of a Polish Air Force jet
2010 Polish Air Force Tu-154 crash
Lech Kaczyński