Do you also accept that this is a very serious security breach?
No, of course I don't. An adventurous 7-year old is not a security threat. The fact that she managed to squeeze through the checkpoints says nothing about whether a real threat could do that.
Unless and until 7-year old girls become terrorists. And please spare me the retort that in parts of the world there are gun-toting children. I do not believe that if this girl were carrying an AK47 she would have penetrated undetected as far as she did.