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Col. William Lieblein, the commanding officer for Marine Aircraft Group 31, addresses an audience during MAG-31's change of command ceremony aboard Marine Corps Air Station, May 20. During the ceremony Col. Michael Cederholm relinquished command of MAG-31 to Lieblein after serving as MAG-31's commanding officer for two years. - Col. William Lieblein, the commanding officer for Marine Aircraft Group 31, addresses an audience during MAG-31's change of command ceremony aboard Marine Corps Air Station, May 20. During the ceremony Col. Michael Cederholm relinquished command of MAG-31 to Lieblein after serving as MAG-31's commanding officer for two years.