Comment Why does it take so long? (Score 2, Interesting) 211
I mean seriously, look at the SLS, it's almost entirely composed of re-used space shuttle parts. It has the main engines on the bottom of the tank re-purposed from the shuttle. it has solid rocket boosters which already exist from the shuttle -- it entirely looks like it could be cobbled together in a few month's time because it uses almost entirely existing components.
So what exactly requires so many years to make it al work when it's all basically existing tech from the shuttle? I hate to say this, but this ain't rocket science.