European Commission President Donald Tusk testifies in Warsaw about the disaster which killed 96 including then-President Lech Kaczynski. Tusk was Prime Minister at the time. He is locked in disputes with Law and Justice over the crash.
Poland releases a new report on the disaster, which killed 96 including then-President Lech Kaczyński, rejecting previous findings and claiming instead air traffic controllers in Smolensk, Russia, gave the jet erroneous information prior to two explosions destroying the jet in midair.
The Polish presidential election is being held earlier, following the death of Polish President Lech Kaczyński in a plane crash on 10 April 2010 near Smolensk. The two front-runners are Bronisław Komorowski from the ruling center-right Civic Platform (Platforma Obywatelska) party and Jarosław Kaczyński from the right-wing Law and Justice (Prawo i Sprawiedliwość) party.
Polish President Lech Kaczyński lies in state in Warsaw as Russia marks a day of mourning and Poland appoints an acting head of the central bank to replace the one killed in Saturday's air disaster near Smolensk.