We're trying to maintain a balance.

So we were the only ones left, so to speak.

The extended journeys taken by the two rovers across the surface of Mars has allowed the science community to continue to uncover discoveries that will enable new investigations of the red planet far into the future.

I don't understand why you're so angry. We come to work every day and we work hard. We really care about this program.

The Europa line is gone because we don't have the money to do it now. We didn't say that we're never going to do it. It's just that we don't have it within this budget framework.

Indeed, the asteroid's orbit is particularly attractive for spacecraft rendezvous, and the extraordinary close encounter in April 2029 provides a unique opportunity to investigate a number of scientific NEO issues.

New Horizons will study a unique world, and we can only imagine what we may learn. This is a prime example of scientific missions that complement the Vision for Space Exploration.

If you want to do Europa, the money is going to have to come from somewhere.

TOPEX/Poseidon revolutionized the study of Earth's oceans, providing the first continuous, global coverage of ocean surface topography and allowing us to see important week-to-week oceanic variations. Its data made a huge difference in our understanding of the oceans and their affect on global climatic conditions.