Reminds me of the big fun fair last year. There have been some incidents in the last years where idiots (either islamic terrorists of white people with mental issues, your choice) have driven cars into groups of people, so there was a rather immense police presence on that fair. As they had promised on the radio they had both uniformed and civilian officers patrolling. I have no idea why they bother with civilian clothes, as the groups of non-uniformed policemen really stuck out like sore thumbs in the flow of happy, carelessly celebrating people. They could have worn helmets with flashing lights and not be any more noticable.