T he seventh Lubavitcher Rebbe Rabbi Menachem Mendel Schneerson zy”a was such a prominent and influential figure that some people assume he was always a fixture in Crown Heights until his passing 23 years ago on 3 Tammuz. But he didn’t arrive in the US until 1941 when he was 39 years old and became Rebbe ten years later at the age of 49 a year after the passing of his father-in-law the previous Rebbe. Where was he before then?