When US soldiers liberated the only Nazi concentration camp in France almost exactly 80 years ago, they found it utterly deserted. Thousands of people were worked to death or murdered in the Natzweiler-Struthof camp in the eastern Alsace region on the German border during World War II. "You entered here by the big gate. You will leave through the chimney" of the crematorium, the camp commander told prisoners arriving in 1943, according to 100-year-old Henri Mosson -- one of the last surviving French inmates. IMAGES AND SOUNDBITES