http://www.flickr.com/photos/ihpics/1217786738/sizes/o/ seems to show it but as far as I can make out it says
‘THE UNITED STATES 8th AIR FORCE
801st/492nd BOMBARDMENT GROUP (h)?
Flew clandestine night missions from this secret airfield during world war two in black B-24 Liberator bombers
dropping munitions and supplies to underground resistance fighters in nazi occupied Europe
They parachuted and landed OSS agents into Belgium, Denmark, France, The Netherlands, Norway and Germany.
They also flew night bombing missions.
208 American aircrew gave their lives flying from this airfield’
Not 100% sure of what it says in the brackets but that is my best guess.