The Centre de détection et de contrôle militaire (CDC) are the French military air traffic control regional centres, that would respond to a threat within French airspace.
CDC Riesling, for the north-east of France, at Drachenbronn Air Base, closed on 17 July 2015, due to budget cuts in October 2014.
There are currently three French CDC centres in operation. One closed in 2012, and another has been made dormant in 2015 - its equipment is still there, but it is not in operation currently.