Opposition leader Jaroslaw Kaczynski, twin brother of the late president Lech Kaczynski addresses several thousand supporters gathered in front of the presidential palace during commemorations of the third anniversary of the plane crash that killed all 96 passangers, as the late president's daughter Marta Kaczynska, left applauds, in Warsaw, Poland, Wednesday, April 10, 2013. Poland is marking three years since the plane crash in Russia that killed President Lech Kaczynski with separate state and opposition ceremonies indicating how divided and embittered the nation has grown in the wake of the catastrophe.(AP Photo/Alik Keplicz)