Was nothing conventional that day, so yeah with both the evidence left,as well as the absence of some,the nuke theory resonates with me....

[....A prima facie case is a cause of action or defense that is sufficiently established by a party's evidence to justify a verdict in his or her favor, provided such evidence is not rebutted by the other party."

1. Nuclear Publications

Many decades ago, various world governments led by the USA took the position to restrict the free-flow of operational details about things nuclear in what is made publicly available, because publishing such could "enable those with bad intentions." Although most nuclear research does not get a public viewing, some of it does, particularly if it is only offering an overview, speculation, and omissions of operational details that would help "arm the enemy terrorist with weapons of mass destruction."

The public work of Dr. Andre Gsponer met those nuclear publication requirements. Noteworthy is also (A) nothing has been published over many decades to contradict, discredit, or debunk Dr. Gsponer's "speculation" into where nuclear research was headed; (B) Dr. Gsponer continually improved his work over many editions [even prior to 2001], indicating assistance from those in the nuclear field.

Those who have professions involving nuclear science (or weapons) in the US eventually sign non-disclosure agreements with stiff penalties [involving charges of treason], or they are left out of all of the interesting research. Besides treason charges, many other penalties involving employment or health & well-being of the individual or family members can be leveraged to keep silent the well educated in science.

2. WHAT IS SPECIAL ABOUT FGNW?
Conventional explosives (and 1st and 2nd generation nuclear devices) couple their energy to the target by means of shock-waves propagating through an intervening medium, such as air, water, earth, rock, etc. FGNW are primarily very intense sources of penetrating radiation that can produce direct work on a target and thus induce a very different response.

FGNW based on low-yield thermonuclear pellets triggered by compact non-fission primaries have yields in the 1 to 100 tons range, greatly enhanced coupling to targets, enhanced prompt radiation effects, reduced collateral damage and residual radioactivity, etc.

A first significant difference between deuterium-tritium (DT) based FGNWs and all other types of explosives is that up to 80% of the yield is in form of high-energy neutrons, so that only about 20% of the total yield contribute directly to heat and blast effects. With proper scaling, this factor of 5 difference means that a FGNW will have a factor of 5 smaller incendiary effect, and a factor {cubeRoot(5) =} 1.7 reduced blast effect -- provided [one] assumes that the energy of the neutrons will be absorbed either in the intended target, or else in a large volume of air that will not be sufficiently heated to significantly contribute to the heat and blast waves. One can therefore conclude that for a given total yield, FGNWs will have somewhat reduced collateral effects in terms of heat and blast.

...
The main effect, however, will come from the neutrons. Not just because they correspond to a circa five times larger source of energy, but because neutrons can easily penetrate inside any material where they can deposit their energy locally and produce volume heating of the material. This means that the coupling can be very high, since there is little reflection in comparison to shock waves, and little losses in comparison to surface effects where part of the absorbed energy is back-radiated or lost as kinetic energy of the ablated material.....]
https://exploringrealhistory.blogspot.com/2018/10/911-fgnw-prima-facie-case.html