Keen was fired because she shut down the Chalk River isotope producing reactor because of safety concerns.   Gary Lunn and Harper disagreed, fired her and re-opened the reactor.   One year later, it had to be shut (this time for over a year) because of leaks - proving that Keen was correct.    Furthermore, the second shutdown caused an isotope supply crisis.   So not only did Lunn and Harper ignore Keen's advice, they failed to secure backup supply channels for the medical isotopes.    Raitt infamously called the crisis "sexy" in an internal email..