How do I become an astronaut?

"If you are looking for a career that combines cool technology, interesting science and great adventure, you could hardly make a better choice than becoming an astronaut. And there is potential for growth in the field. With the construction of the International Space Station, there will be a permanent human presence in outer space and a need for astronauts. But becoming an astronaut in the U.S. space program is not easy, and the process can take several years."

[via how stuff works]