The half-Jewish Nazi Who Saved the Lubavitcher Rebbe (haaretz) (alt link)
Thanks to the late Rabbi Menachem M. Schneerson, Chabad Lubavitch is a well-known and powerful Hasidic movement. But few people know that the rebbe's predecessor, Rabbi Yosef Yitzchak Schneerson, owes his life to a half-Jewish Nazi officer acting under the direct order of the head of the Third Reich's military intelligence agency.