With a tip of the hat to Honors History II at Chantilly High School.
Slide: Revolution Simplified
The above diagram “WTC demolition damages distribution,” from Dimitri Khalezov’s work, illustrates how an underground nuclear device would turn to dust much of WTC1 and WTC 2, but not all. The use of micro-nukes in conjunction with the larger underground nuke is a possibility.
Below are from the Vancouver 2012 conference at which the use of 3rd generation micro-nukes was presented. The nano-thermite cover story is referred to as a “limited hangout” in intelligence parlance.
Figure 5, Chapter 1, INTELLIGENCE with INTEGRITY: Enabling Hybrid Public Governance with Open-Source Decision-Support (Earth Intelligence Network, forthcoming 2013)