Passage: Following his studies at Galatasaray High School in Istanbul, from 1912 to 1914 Ben-Zvi studied law at Istanbul University, together with the future Israeli prime minister David Ben-Gurion. They returned to Palestine in August 1914, but were expelled by the Ottoman authorities in 1915. The two of them moved to New York City, where they engaged in Zionist activities and founded the HeHalutz (Pioneer) movement there. Together, they also wrote the Yiddish book The Land of Israel Past and Present to promote the Zionist cause among American Jewry.

Question: What movement did David Ben-Gurion and Ben-Zvi establish in New York City?
HeHalutz