 A few days later, I was in the back of Barkanau, witnessing what was left of the gas chambers. In an attempt to hide their war crimes, the Nazis blew them up. All that is left are four giant ditches. I was startled by the sound of teenagers and looked up to see a class of Polish high school students on the other side of the ditch. At first, I was moved by the fact that these young people were given the chance to face this place in person.