"saving Jews from a Russian pogrom at peril to his life."

Pogroms are mob attacks on a specific group or section of a community. The most frequently occurring pogroms throughout history have been those carried out against Jewish populations. The purpose is to bring terror, chaos and destruction to the people targeted, and possibly to drive the group out of the community. 

Perhaps the most famous pogrom of all is that which occurred in Nazi Germany in November 1938, signalling the beginning of the Holocaust. Known as Kristallnacht, or the night of broken glass, it remains a horrifying testament to the devastation and destruction of pogroms.