That was geese terrorism.
Canadian geese probably too (seriously and unfortunetly).
Its certainly possibly that stuff in smolensk plane crash had other people involved but thats a conspiracy theory. There is no proof. Did anyone hear that the guy with the video of the crash got killed later on somewhere?
Is that terrorism highly unlikely and it wasnt by extremist muslims.
I think that its the US and Britain that have to worry most about these issues.
Maybe France too.
Im quite positive Poland will be safe. Just lay low and dont go to every war.