Members of the Lubavitch community leave Chabad-Lubavitch Hasidic headquarters being guarded by police officers, left, Tuesday, Dec. 9, 2014, in New York. Earlier a knife-wielding man stabbed an Israeli student inside the Brooklyn synagogue before being fatally shot by police after he refused to drop the knife. The student, Levi Rosenblatt, is in stable condition. (AP Photo/Mark Lennihan)