"Sir, I understand you didn't like it, but you've already eaten most of it. I'll have to get a manager."
The problem was that the wind was blowing tremendously. See, this is something that doesn't come up in the movies -- when you're trying to shoot from far away with any kind of wind, you have almost no goddamned idea where the bullet will end up. Sniping isn't just holding the cross hairs steady on the tiny soldier in the scope; it's trying to predict gusts of wind that could push the bullet into some innocent tree trunk 50 feet away. And yes, that's how much of a difference wind can make. You can not only miss the guy, but miss the whole house he's standing in.
So that's what happened to all those road signs in the country!
Oh, and as if his fate were being written by the vengeful spirit of a vaudeville comedian, Hughes discovered that his targets were a little over a half mile away, which, powerful wind notwithstanding, was beyond the range of the rifle he was using. To make matters worse (and yes, there apparently was still room for them to get worse), the enemy soldier he was targeting was covered in a fortified position, with only a small portion of his head and torso exposed. Hughes would have only one chance, because if he took a shot and missed, the Iraqi would simply duck completely behind cover and never come back up. It'd be like if Luke Skywalker had been commanded to park his X-Wing at the beginning of the trench, and to lean out of the cockpit with a grenade wedged in his ass and try to power-shit it into the Death Star's exhaust port.