Poland Plane Crash Black Box

epa02119729 View of the Airforce Institute of Technology ( rear ) in Warsaw , Poland , 16 April 2010 . The black box from the plane which crashed near Smolensk killing Polish President Lech KaczynskiPolish dignitaries while on their way to a commemoration in Katyn , Russia on 10 April , returned to Poland on 15 April 2010 . Investigations into contents of the black box began on 15 April at the Airforce Institute of Technology .  EPA/LESZEK SZYMANSKI POLAND OUT