Dan Billa Reporting News Today

Rocket. >> we do this a lot. but it never changes. its very exciting. >> reporter: it will be the most capable rover sent to another planet. nuclear-powered, ten feet long, its supposed to lost two years and could last longer. scientists hope it gives the first confirmation of the building blocks of life outside on earth. it will look for complex, carbon-based molecules, the find you and i are made of. but mars is still a long way off. a 345 million-mile journey. >> we have spacecraft separation...