Hi Bill
As far as I can say; he's FoS.
Everyday I went to the Sector South West Commander's Brief and the "Boys in Blue" (from various coalition nations) stood up to say their bit about Air Support available in-country (and to our Sector). Never once did I hear US and Harrier mentioned. All a/c off-shore was US Navy and definately not Harriers. Of all the in-country a/c I saw and heard about, never once did I see a US Harrier and certainly not a US Army Harrier.
There were Harriers in Kandahar during my time and they were all Royal Air Force (RAF).
Geoff is right; Marines (US variety) fly Harriers, not Army. US Army flies Helos and light Cargo a/c.
That's all I know but maybe it's changed since I returned 7 weeks ago!!
regards
Darrell