US Army UH-1B helicopter dropping mortar rounds in a test run bombing mission   Publication Date:   1966-06-02 Creator:   Mangiboyat, Bernie ( Photographer ) Publisher.Display:   U.S. Army Publishing Agency Subjects.Display:   Vietnam War, 1961-1975 UH-1 (Helicopter) Source Institution:   Florida International University Donor:   Harlem, Peter Wayne US Army UH-1B helicopter dropping mortar rounds in a test run bombing mission