According to both http://www.panoravia.nl/rubriek/forum/v ... hp?p=14487
and
http://www.lvtwenthe.nl/nieuws.htm
there MAY be an exercise involving Apaches and Chinooks, and possibly Cougars at the former Royal Netherlands Air Force Base of Twenthe.
F-16 support would also be part of the exercise, but the jets would not operate from Twenthe AFB itself.
Timeframe? "March 2013"...