Some United States Marines are reportedly running short of food and ammunition.Others have been pinned down for days trying to clar Iraqi resistance. But United States Central Command Headquarters insists that everything in Operation Iraq Freedom is going fine. 'Our plan is working, and we are one day closer to achieving our objectives Brigadier General Vincent Brooks said at a daily breifing.Reporters in Central Iraq have said that some units are running short of food, fuel and ammunition, much of which was expended battling an Iraqi army the brass and some politicans hoped would melt away.