Even today flying into space is an undertaking at the borderline of what is curreiitly feasible. h veq complex assen bly of sophist icated machinery is needed in order to reach orbit and return from there to Eart, ll safely. A11 ast, ronaut knows that only if t, he rocket engines, inertial navigat, ion platforms. hydraulic systems; generators of electrical power, att, itude control systems, life support sj stems, coinput ers. data transmission equipment, heat shields and many other components work flawlessly can he or she accomplish a mission in good llealt, h. I11 other words there is risk,...