A while back a lawyer 'friend' - well, we have a few beers now and then - gave me a summary of the standard escalating defense process when you have clearly done something wrong... In this case the scenario was your dog had bitten someone. He recommended:
* The dog was clearly provoked.
And if that doesn't work....
* The other person's dog started it.
And if that doesn't work....
* The dog has never done anything like that before.
And finally......
* You don't have a dog!
Suing the airport for two run-offs smacks of "I don't have a dog!"