sentences:  On 8 June, while aiding the disabled USS "Rich", "Threat" narrowly missed becoming the victim of a mine that sank the destroyer escort off Cardonet Bank.A shore battery fired on "Threat" as she was running acoustic and magnetic sweeps off Cherbourg on 9 June.The doughty minesweeper returned the fire with her 3-inch gun, silencing two shore gun employments and exploding a small ammunition dump.