The presidents of Poland, Germany, and Israel knelt at the Monument to the Ghetto Heroes in Warsaw, Poland, on Wednesday, April 19, marking 80 years since thousands of Jews died in a ghetto uprising in the city.Footage shows Polish President Andrzej Duda, German President Frank-Walter Steinmeier, and Israeli President Isaac Herzog paying their respects at the monument.The Warsaw Ghetto was the largest Jewish ghetto in Nazi-occupied Europe. On April 19, 1943, residents began to fight back against mass deportations to concentration camps.The United States Holocaust Memorial Museum estimates that at least 7,000 Jews died during fighting in the ghetto, and tens of thousands more were taken to concentration camps where they were killed. Credit: Kancelaria Prezydenta via Storyful