Goblinsattackin, I am sorry if that wasn't clear enough.
As you might have seen, airports are divided into two areas: one open to the public, which you access from the road and public trasport, and another one accessible only to members of staff and passengers entitled to fly.
The second one is called sterile area, cause everyone and everything is screened in order to enter it.
Thank you for pointing this out and taking your time to complete my survey.
Army horses loose on London streets