In this Oct. 11, 1951 file photo, Lt. Col. Donald B. Stewart, left, locates the site of a mass grave near near Smolensk, Russia, to Rep. Ray Madden, D-Ind., during a special House Committee hearing in Washington. Stewart and Lt. Col. John H. Van Vliet Jr., were among a group of British and American prisoners forced by the Germans to see a horrifying site, a mass grave where murdered Polish officers were buried, near Smolensk.
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