When you approach the Erez frontier post to enter Gaza from the north, you notice a concentration camp straightaway even if you may never have seen one like the ones turned into museums or educational centres, or like the ones that appear in documentaries or photographs.
An observation balloon, innocently painted white, rocks gently to and fro in the air over the wall surrounding Gaza. It makes sure no unhappy soul moves beyond arbitrary limits set by the camp guards. The visitor is overwhelmed by the mammoth steel-reinforced wall. This imprisons a million and a half inmates inside an area approximately 38 kilometres long and 12 wide at its widest.