Today, the story of the Jewish educator and children’s author Janusz Korczak (né Henryk Goldszmit), the founder and director of a Jewish orphanage in Warsaw before and during World War II, is well-known in Poland, especially after it was recounted in a 1990 film. Korczak, having turned down offers to escape the Warsaw Ghetto, remained with his charges and was sent along with them to Treblinka to be murdered in 1942. Far less well-known is the very similar story of Rabbi Dawid Alter Kurzmann of Krakow, but he is now getting some much-deserved recognition, Ofer Aderet writes. (Free registration may be required.)

According to the Lebanese government, the explosion in its capital city on Tuesday that left over 100 dead and many more injured or homeless was caused by the accidental detonation of some 2,750 of ammonium nitrate, a fertilizer often used for making bombs. (Less than one-thousandth of that amount was used by Timothy McVeigh to destroy the Oklahoma City federal building in 1995.) Previously, police have discovered Hizballah warehouses in London and Germany storing many tons of the same explosive. Hussein Ibish comments: