Seventy years ago this week, German authorities liquidated the Warsaw ghetto. At its peak, more than 400,000 Jews were crammed into the ghetto, living in squalid conditions with insufficient food rations. No more than 20,000 of them survived the Holocaust.

FRONTLINE filmmaker Marian Marzynski was one of them.

In his latest film, Marzynski returns to Poland and the Jewish ghettos of his childhood; but this time, he is not alone. In Never Forget to Lie, Marzynski chronicles the poignant, painful recollections of other child survivors, and the ramifications of identities forged under circumstances where survival began with the directive “never forget to lie.”

What impact did years of lying about their identities have on these child survivors? And what’s it like to return to the homes they left so many years ago? Will the world remember their stories when they’re gone?

We’ve asked Marian to join us in a live chat to answer those questions — and take yours.  He’ll be joined by Peter Black, senior historian at the United States Holocaust Museum.

FRONTLINE would like to thank the United States Holocaust Museum for partnering with us on this chat.

You can leave a question in the chat window below, and come by at 2 p.m. ET on May 14 to join the live discussion.