In 2001, the launch pad for the “Delta 4” rocket set off from Brunswiek in Georgia to the Cape Canaveral Space Center in Florida, some 370 kilometres away. The pads give rockets the necessary thrust and sufficient stability when launched from the ground, and keep them on course. This needs weight: the launch pad was around ten metres high, eleven metres wide and weighed 600 tonnes – as much as 120 elephants.