MungoP,
You are doing noble work. I hold gratitude for you and all who take on some significant risk to do a job that needs done for good causes.
I lament that politics have caused the workers for KB&R (Haliburton), and many others, to be maligned as greedy profiteers as they drive the trucks through minefields, work in the tents to serve meals, provide security, and lay the sewer pipe and build the power plants, etc., to try to make things better in the war zone. Many of these people have lost their lives along with the GIs.
They don't get the glory of the combat troops in uniform, but they face the same challenges and fears. My hat's off to you.
Cheers,