Open this photo in gallery: Police officers detain a man at the Holocaust memorial in Berlin, Germany, after another man was seriously injured, on Feb. 21.Ebrahim Noroozi/The Associated Press The man arrested after a Spanish tourist was stabbed at Berlin’s Holocaust memorial on Friday was a 19-year-old Syrian refugee, Berlin prosecutors said, a day before a national election in which concerns over migration are expected to boost the far-right AfD party. Motivated by the Middle Eastern conflict, the suspect appears to have been planning to kill Jews for several weeks which is why he chose this location, the prosecutors said...