Nationalist Law and Justice party leader Jaroslaw Kaczynski, left, lays a wreath 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, seen in picture at right, and 95 others were killed. Opposition leader Jaroslaw Kaczynski has fueled theories that the crash was an assassination, although 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)