1. 100 years ago, Henry Ford introduced one of history’s great inventions, . 2. The assembly line has always been an impressive mix of . 3. Ford visited the meatpacking business in Illinois, and there he saw that the . 4. The assembly line gave mobility to the average American and helped create the . 5. Allison Stevens can approximate an assembly line in her office, testing parts and designs without the need to build . 6. With 3D animation, you can see every fastener, every hole, every bend in .