 Complete the following phrase:  At the time of the Nazi invasion in 1940, Joliot-Curie managed to smuggle his working documents and materials to England with Hans von Halban, Moshe Feldenkrais and Lew Kowarski. During the French occupation he took an active part in the French Resistance as a member of the National Front. Collins and LaPierre in their book Is Paris Burning? note that during the 