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Huntington Ingalls Industries’ (HII) Ingalls Shipbuilding division successfully launched the Arleigh Burke-class (DDG 51) guided missile destroyer Frank E. Petersen Jr. (DDG 121) on Friday. DDG 121 is the sixth (of nine) Arleigh Burke-class, "Flight IIA: Technology Insertion" variant. "Technology Insertion" ships are fitted with elements from the future DDG 51 Flight III.