From the linked report: > The material required for construction of the cable is a carbon nanotube composite: currently under development and will be available

From the linked report: > The material required for construction of the cable is a carbon nanotube composite: currently under development and will be available in 2 years. Its actually crazy that the report thinks that we would have the necessary material in 2005 and is still used as evidence of a practical space elevator. The graph on page 10 shows the absolutely massive extrapolation from data at the time. It seems disingenuous to even talk final price and time to construct a space elevator (as is done in the one-page brief) without any data confirming the possibility of manufacturing the goal material.