The other space fairing nations arounds the world are building rockets.....Private industry is going to explode over the next 20 years.....So now we need rescue capablity, repair capability, resupply, crew change, and cargo transport, maybe security? would you really launch a new vehical for each need as it arose?......do we not always build a base of operations....airbase, firebase, refugee base, etc..the need for a permanantly manned platform capable of at least going to the moon on a monents notice. capable of changing orbits, the ablity to stay in space for long period of time. with plenty of fuel........call it an aircraft carrier in orbit. when the tsunomi hit south east asia....the american aircraft carriers where the first on the rescue. to all land masses in the area at the same time.<br />