Potentially also of interest is this [0] article which describes the attempts to build a nuclear powered boring machine that worked by melting rather than cutti

Potentially also of interest is this [0] article which describes the attempts to build a nuclear powered boring machine that worked by melting rather than cutting the rock. [0] http://atomic-skies.blogspot.com/2012/07/those-magnificent-men-and-their-atomic.html http://atomic-skies.blogspot.com/2012/07/those-magnificent-m...