Holocaust Survivors Remember

This is a phrase related to the Holocaust. All the letters have fallen down.
Can you help put the phrase back together? Hint: the phrase starts with the word 'we'.
As you use a letter cross it out; that will help you keep track of what you have done.

Created by Puzzlemaker at DiscoverySchool.com
html editing by Janet Barnstable, Julian Middle School, USA
Picture from Ein Ganim School, Israel