Video: Bergen-Belsen survivors sing HaTikva, now Israel's national anthem

At 8:00 Sunday evening Israel time - about 15 minutes before this post goes live - a siren will go off here in Israel marking the beginning of Holocaust Remembrance Day observances (although Holocaust Remembrance Day is normally observed on 27 Nissan, this year it is pushed off to 28 Nissan so that preparations will not begin on the Sabbath).In this video, you will hear Jewish survivors of the