Nationalist Law and Justice party leader Jaroslaw Kaczynski attends a wreath laying ceremony in front of the Presidential Palace in Warsaw, Poland, on Tuesday, April 10, 2012 to mark the second anniversary of the presidential plane crash in Russia in which his twin brother, President Lech Kaczynski, and 95 others were killed. Opposition leader Jaroslaw Kaczynski has been fueling theories that the crash was an assassination and his followers have been mentioning Russia's Prime Minister Vladimir Putin and Poland's Prime Minister Donald Tusk in that context. Two separate probes in Russia and in Poland have concluded that the crash April 10, 2010 in dense fog in Smolensk was an accident. (AP Photo/Czarek Sokolowski)