British and French forces simulate attack response
15 October 2013 Last updated at 20:42 BST
Pilots from the British and French air forces have taken part in an exercise simulating the defence of RAF Leeming in North Yorkshire after an attack.
Operation Capable Eagle involves pilots working together to forge closer ties between the two countries.
BBC Look North reporter Danny Carpenter was there and talked to Sir Andrew Pulford, Chief of Air Staff.