The border crossing between the Gaza Strip and Egypt briefly re-opened on Friday, for the second day running. The Rafah crossing, Gaza's only gateway to the world that does not go through Israel, opened for three hours. Reports say 1,200 people crossed into Egypt.No reason for the closure was given, but Israel has often prevented the opening, citing security concerns. Apart from this week, the crossing has been opened just once since 25 June, to allow Palestinians to return to Gaza.