Most of the preliminary versions of the crash of the Polish presidential plane have been ruled out completely, Tatyana Anodina, Chairwoman of the Interstate Aviation Committee (IAC), told reporters. Photo: IAC specialists decoding parametric and sound data stored on the flight recorders from the Tu-154M air liner that crashed near Smolensk on April 10, killing Polish President Lech Kaczynski, his wife and dozens of other senior officials