“France will impose border controls for one month from 30 November for the UN Conference on Climate Change in Paris. French Interior Minister Bernard Cazeneuve said it was a precaution ‘because of the terrorist threat or risk of public disorder’. ‘It is by no means a suspension of Schengen,’ he stressed, referring to the EU free travel zone where passport checks are minimal or non-existent.”
Source: UN climate conference: France to impose border controls – BBC News