sentences:  Hamdo promptly informed Dudaković, who ordered that all aid workers be confined to quarters and that large fires be started using piles of tires to create the illusion of burning buildings.Then Dudaković told his dumbfounded troops to fire in the air as if they were fighting an invisible enemy.Fikret Abdić and his Serbian backers, watching from a distance, saw the smoke and heard the gunfire while listening to rattled aid workers yelling over their radio channels for extraction.