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Approaching their targets, the "downtown" aircraft (flying F-16s with newer model engines) passed F-16s on the way to, rolling in on, and leaving targets all in a hostile environment. On their way to downtown, the F-4 "Wild Weasels" left, being low on fuel. This left the F-16s and F-15Cs alone against the air defenses. As Maj. John Nichols rolled in to strike his target, the Iraqi Air Force Headquarters, he heard the Weasels call that they were leaving. Cloud cover obscured the target; Nichols rolled off to turn to an alternate target, an oil refinery which was under attack by a portion of his formation.