And, as I know, in Katyn was killed polish officers who is killing soviet prisoners of war after soviet-polish war only.[/quote]
If you still belive in that, you should take a look at wikipedia.
In Katyn were 25700 polnish People killed! Most of them POW`s and intellectual people
Have a look here:
http://en.wikipedia.org/wiki/Katyn_massacre
http://www.electronicmuseum.ca/Polan..._wall/kmw.html
Please be careful with your writing if you do not know things for sure.
Kind regards