Guys,
I'm not saying that there are not lessons to learn from this tradegy.
However hard you try, however many rules you have in place, if someone doesn't keep a good lookout/ignores proceedure/shows off/ignores authorisations - a crash can result. (I am not saying the Puma crash was caused by ANY of the above!)
It is all to easy to jump and say 'Things must change so this can never happen again!' BUT Gents, just adding to the rules is not always the safest way forward. Making sure that the risks are reduced to As low as reasonably practicable- through orders/education/authorisations is the perfect ideal to which we should all aspire. It still needs the man in the seat to follow them, and use sound airmanship and judgement.