Boris Romantschenko, who survived four Nazi concentration camps during World War II, has been killed by Russian shelling that struck his flat in the Ukrainian city of Kharkiv, the Buchenwald Memorial Foundation said on Monday. He was 96 years old."It is with dismay that we have to report the violent death of Boris Romantschenko in the war in Ukraine," the Buchenwald and Mittelbau-Dora Memorials foundation said in a statement.Romantschenko died at home on March 18 after his building was bombed in the heavily shelled eastern city, the statement said, citing information from his son and granddaughter.Describing him as "a close...