“Four days before the declaration of World War II, on August 27, 1939, the test pilot van Chaim flew the first jet aircraft in the world, the Heinkel 178. Only a small circle of people directly concerned knew of this event, which for that time was of great importance. Exactly a year later, on August 27, 1940, the first Italian jet plane, the Caproni-Campini made its first flight. It reached 300 mph, and the event received great propaganda.”