Chaim Gross historian Lewis Jacobs made a 30-minute feature of Gross carving, called "Tree Trunk to Head", showing Gross at work in his East Village studio on a portrait of his wife Renee, who models in the film. In 1949 Gross sketched Chaim Weizmann, President of Israel, at several functions in New York City where Weizmann was speaking. Gross began a portrait in clay and then traveled to Israel in the summer of that year hoping to be able to meet Weizmann and have him sit for a portrait. Weizmann was too ill, but Gross completed the bust in bronze later that
Chaim Weizmann in No. 502 Squadron RAF, he was killed when his plane was shot down over the Bay of Biscay in February 1942. His body was never found and he was listed as "missing". His father never fully accepted his death and made a provision in his will, in case he returned. He is one of the British Empire's air force casualties without a known grave commemorated at the Air Forces Memorial at Runnymede in Surrey, England. The elder son, Benjamin (Benjie) Weizmann (1907–1980), settled in Ireland and became a dairy farmer. His nephew Ezer Weizman, the son of his brother