Edward - I agree. The investigation is not complete, yet.
The explosive, sol-gel nano-thermites were developed by US government - the NIST (National Institute of Standards and Technology) did not consider explosives in its hypthoses re destruction of 3 WTC buildings -
More info here:
The Top Ten Connections Between NIST and nano-thermites (pdf 12pp)
peace
PS I just noticed that blastawaycas has a thread about Kevin Ryan's paper too
http://projectavalon.net/forum/showthread.php?t=13330