What I mean is those who are currently serving will have access to the data/details about what groundfire brought the aircraft down. Those who are not currently serving do not need to know exactly what brought the aircraft down other than it was 'groundfire'.
You are pretending that official secrecy should protect either the aircraft's vulnerability to ground attack, or the capabilities of ground to air weapons available to the insurgents.
Isn't that why things are kept classified to reduce the vulnerabilites to the enemy. If the enemy knew what the weak spots were, they would concentrate their efforts in that field.
I served on 47 and am still in and keep in contact with many people at Lyneham, so I am fully aware of the issues which is why I said what I said. If someone really needs to know what the threat was, then they can speak to someone who knows the answer rather than make that answer public on a site visible to friendlies and enemy alike.