In session or not, they can be arrested for the treason and felonies committed.
First, Assad doesn't gas his own people. And second, we are not the Syrian Police, so any situation that 'happens' should be no concern of the United States.
I wonder if they will have to cover the losses:
"London’s Gatwick Airport reopened on Friday morning, but the costs of the unexpected 36-hour shutdown of Britain’s second largest airport are still being tallied.
Businesses including airlines, retailers, hotels and taxis could easily have lost millions in combined revenues after drones were spotted around the airfield, forcing the airport to stop operations and call in the military for help.
The airport alone is expected to have lost hundreds of thousands of pounds in revenue, according to estimates by John Grant, director of the UK-based consulting firm, JG Aviation Consultants."
finance.yahoo.com/news/gatwick-airport-costs-shutdown-easily-reach-millions-120759115.html