Wings1011
initially did write my first post much more detailed and it took me some time to write it, but it did disappear in the cyberworld somewere when posting it.
Thanks for the very insighful post, abbreviated or not, in not your first language, which must have taken time. SO even more thanks for the perseverance. Should you still have a draft of your initial, more detailed post, I would encourage you to post it because the additional quality detail could only contribute further to trying to get to grips with what caused this awful tragedy. Thanks again for all your inputs.