Once-top secret documents suggest US officials helped cover up a Soviet massacre of 22,000 Polish troops in 1940.<br /><br />The United States National Archives released the documents on Monday.<br /><br />The now declassified memos indicate American prisoners of war were taken by their German captors to Katyn three years later, where the rotting corpses of the Polish troops remained.<br /><br />...<br />http://www.euronews.net/
