U.S. Marine Corps photo by Master Sgt. Kristin duBois/Released 140218-M-KN144-003.JPG
Feb 19, 2014
Col. Michael J. Colburn promoted trumpet/cornet player Michael Mergen to master sergeant on Feb. 18, 2014 at the John Philip Sousa Band Hall in Washington, D.C. (U.S. Marine Corps photo by Master Sgt. Kristin S. duBois/released)
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