By "killbox" it just means the target or focus. In that case the focus was I (Iridium missile guidance system). Q puts brackets around a specific topic if he's elaborating or referring to it in another sentence.
By "killbox" it just means the target or focus. In that case the focus was I (Iridium missile guidance system). Q puts brackets around a specific topic if he's elaborating or referring to it in another sentence.