Future use of fission for space travel

Future use of fission for space travel: this is a great overview of the past and current use of nuclear technologies in space by the World Nuclear Association: http://www.world-nuclear.org/info/inf82.html ..., also see : http://news.discovery.com/space/project-bifrost-interstellar-space-fission-120120.html for Project Bifrost which is "examining emerging space technologies that could lay the foundation for future interstellar flights and investigates the utility of fission for future space missions." quite neat!