United States President Barack Obama has caused an outcry in Poland after referring to a Nazi death camp as "Polish".
He made the remark at a ceremony on Wednesday in which he posthumously awarded Polish resistance fighter Jan Karski with the Presidential Medal of Freedom.
The White House says Mr Obama "misspoke" and regrets the comment, but prominent Poles want an apology.
Almost six million Poles died in World War II.
More than half were Jews, many of them killed in Nazi death camps including the Auschwitz-Birkenau camp.