United States Army engineers have recently added to the mobility of armored forces by adopting a massive rubber ponton constructed in a Goodyear factory. Inflated, the pontons resemble huge sausages, which can be joined quickly to form a bridge “paved” with heavy steel treadways capable of carrying heavier loads than any other portable military bridge. They may be used also to form rafts for ferrying. When deflated, the pontons can be rolled into compact bundles.