This Delta IV heavy lifter still only has a fraction of the power of the old Saturn V. The Saturn V put out about 160,000,000 horsepower, versus the 51,000,000 horsepower for the Delta IV. The Delta IV is probably more efficient, but think about where the Saturn V (or VI, or whatever) might be today after another 30 years of development. I am not knocking the Delta IV, just lamenting the Saturn V.<br><br>For those who don't know, the Saturn V was killed by politics, to ensure that the Space Shuttle was the only way to go. Now the space shuttle is grounded and the space station crew is hungry.<br><br>I remember the old Skylab space station, which is huge compared to the Russian Mir (I am not sure how it compares to the International Space Station). The way we put Skylab up was to strap the whole thing on top of a single Saturn V and blast the whole thing into space at one go. When I watched how they had to bring the ISS up piece-meal it made me want to cry - two or three Saturn V launches could probably have got most of it up there pretty quickly, and more of the assembly could have been done on the ground.