Rocket scientists agree that ...

Rocket scientists agree that we have about reached the limit of our ability to travel in space using chemical rockets. To achieve anything near the speed of light we will need a new energy source and a new propellant. Nuclear fission is not an option.
 Wilson Greatbatch

Quotes from the same author

The 20th Century was the century of Aviation and the century of Globalization. The next century will be the century of Space.
 Wilson Greatbatch
France generates a significant part of its energy requirements from fission reactors and these have achieved a perfect safety record. We build ours all differently.
 Wilson Greatbatch