Ruth Cohen, a 94-year-old American Holocaust survivor, returned to the Auschwitz concentration camp in Poland for the first time. She recalled seeing family members before they were separated for the last time at the camp.

Survivors of Auschwitz, where the Nazis murdered more than 1.1 million people, urged world leaders to be vigilant against a dangerous rise in antisemitism and extremism during a ceremony commemorating the anniversary of the death camp’s liberation in 1945.