The Similarity Between Aerospace and Nuclear Space Travel

CNN's John Defterios talks with former NASA astronaut Lex Casabrid about his new project. The idea for a nuclear-powered space shuttle was developed at the University of Missouri 40 years ago, but it never took off industrially. He says he has been inspired to do something about this after reading an article thatLex wrote last year and co-author Jason Casabrid read in 2012.