Throw a dyce
The Serco contract(s) in Iraq have been shaky since the first day (January 1, 2011).
For many reasons (politics, culture, other bidders offering a bit more grease, staffing issues, etc) it has never been a certainty that Serco will get the contract each time it`s up for renewal. And at some point (3 years, 5 years, maybe 10 years down the line) the intent is for the Iraqis to be able to operate ATC on their own. I make no comment as to the feasibility or likelihood of that happening...