(Washington FreeBeacon) Treasury Secretary Jack Lew will represent the United States at the 70th anniversary ceremony for the liberation of the Auschwitz concentration camp on Tuesday—rather than President Barack Obama or Vice President Joe Biden—while other countries are slated to send their heads of state.

Tuesday’s ceremony will likely be the last major anniversary where a significant number of survivors of the Nazi camp are present. About 300 are expected to attend, and most of them are in their 90s or older than 100. Nazi authorities killed 1.1 million people at the camp, mostly Jews, which was liberated by the Soviet army in January 1945.

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