Man on Mars

The ambition to conquer the universe seems to be unsatisfiable for many individuals and countries.
The NASA has been working lately on a couple of prototype rockets, named Ares I and Ares V, that will be able to take the first human being to Mars. The rocket, for now, is only a revised idea, but they're expecting to be performing its first test flight around the year 2013. If everything works as they are planning, we could have the first individual traveling to Mars around 2030.
The whole project for the conquer of Mars, named Project Constellation, goes much further than only the assembly of both rockets. It is thought that around the year 2020, it will be necessary to build a module in the Moon, which could be used as a stop between the Earth and Mars.
It is important to mention that the construction of the module in the Moon is a project envisioned a long time ago, and initially, the plan was to build such model at the beginning of the 21st century, which didn't happen. Will they be successful in their plan this time?
To know if they will be successful or not is only a matter of time. However, the plan to reach Mars in the future sounds great to me... as long as we don't plan to colonize Mars as an alternative to destroy further nature on Earth.