I wonder what kind of safety precautions have been taken to protect the crew in case of an accident (or is this highly classified)? Liquid/gel buffers (or air bags) in combination with 'cocoon seats', fire-proof layers, a titanium shell around the crew compartment etc. could presumably make the vehicle very safe indeed (at moderately higher cost).The design of regular rockets and the space shuttle would permit even better safety measures, like a crew compartment that automatically "ejects" in case of a mishap (a la Challenger), and gently floats back to earth. For some strange reason, this part of the design has always been neglected. Similar techniques could be used for VIP transport in planes btw.