Mike - there ia a lot of comment about "hiding behind trusts".
For the record, there is no hiding.
The trusts are non-citizen trusts - if you are not a US citizen you cannot register a US airplane, so it must be registered by a trust.
The non-citizen trust most use around the world is SAC - got an issue you sue them and if the beneficial owner does not step up the SAC will sue them, not difficult to understand. Indeed it is no more complicated than a UK airplane held by a limited liability company, the paper work can be examined and the owner revealed.
It is my understanding that SAC were forthcomming about the beneficial owner of the Sala airplane; the trust documents are registered in OK City and a freedom of information request will get you a copy - there is no hiding.
There is no hiding of anything.