Tom Clancey described these missiles as having the mission to: "turn Cheyenne Mountain into Cheyenne Lake."
The novel "Arc Light" also has a description (probably not that accurate) of a limited strike by Russia against the US that includes destruction of the bunkers at Cheyenne Mountain, Raven Rock Mountain and Omaha:
Probably not that accurate indeed: several Amazon reviewers noted his descriptions of "vicious" recoil from M16 rifles (!!!). If he got something so widely, if not infamously, well known so wrong, why would we expect anything else to be correct?
On the other hand, an early strike at both ends of the tunnel is very different from eroding it over some period of time (has to be some separation to avoid fratricide); if the construction was done well enough, the latter might have provided more time for NORAD to transmit additional data about the attack in progress.
Not even a large mountain is going to withstand multiple 20Mt hits.
http://en.wikipedia.org/wiki/R-36_%28missile%29
Tom Clancey described these missiles as having the mission to: "turn Cheyenne Mountain into Cheyenne Lake."
The novel "Arc Light" also has a description (probably not that accurate) of a limited strike by Russia against the US that includes destruction of the bunkers at Cheyenne Mountain, Raven Rock Mountain and Omaha:
http://en.wikipedia.org/wiki/Arc_Light_%28novel%29