Over the years, we tend to think that nuclear technologies and the necessary know—how to ensure nuclear safety have been developed to a level that possibilities for any major nuclear accidents are almost non-existent and if it does happen, it will be that you just can't be too careful to handle nuclear energy. We don't know for sure yet what will be left behind Japan's nuclear crisis, but it will be certain that it is time to re-examine our nuclear practices and many more efforts need to be made to ensure nuclear safety in the future.