A Holocaust survivor who endured the horrors of as many as four Nazi concentration camps during World War II has been killed in a Russian rocket attack in Ukraine. (adsbygoogle = window.adsbygoogle || []).push({}); Boris Romantschenko, a 96-year-old who survived the Buchenwald, Mittelbau-Dora, Bergen-Belsen and Peenemünde concentration camps, died Friday when a Russian rocket hit his apartment building in the second city of Kharkov. The news was reported by the Buchenwald and Mittelbau-Dora Memorials Foundation and confirmed by Romantschenko’s son and granddaughter. The foundation, which manages the Buchenwald and Mittelbau-Dora camp memorials and supports education about the Holocaust and Nazi...