interesting in the Gulf we had to salute US officers of higher rank but we were ignored by US soldiers of lower rank. And given the extreme bad manners of US soldiers and officers saluting whilst smoking using mobile phones I think that for the US military to complain when we ignore them is a bit much. My best one on a US base was "Excuse me son but I am entitled to a salute as a warrant officer" to which I replied " In the British army as a Warrant officer you aren't but I as a Captain most definitly Am!" stunned silence and half hearted salute.