And we don't at the moment have a rocket big enough to get there anyway. We once had that rocket, the Saturn V. A couple of Saturn Vs would have gotten us there. It was the most ______machine ever built by humans, and it was the rocket that took us to the Moon. But the last Saturn V was used in 1973 to launch the Skylab ______, and we decided to do something called the shuttle instead of continuing on to Mars after we landed on the Moon. The biggest rocket we have now is only half big enough to get us anything to Mars.