[ac29]

I dont think its clear that nothing can be done, its just that nothing was done. Going weapons hot with military anti aircraft guns within a few miles of civilian ships and aircraft is probably not something that any sane officer is going to order, unless there is a safety of life issue.

[stjohnswarts]

A shotgun doesn't "go for miles" they could have easily brought down some of these invaders to see what was going on (if they got lucky)