LOS ANGELES — Emmy award-winning actor Harry Morgan, who played the crusty yet sympathetic Col. Potter in the sitcom “M*A*S*H” and the hard-nosed LAPD Officer Bill Gannon in the television drama “Dragnet,” died of pneumonia Wednesday in Los Angeles at the age of 96. Mr. Morgan’s eight-year run on “M*A*S*H,” the pinnacle of his seven-decade acting career, began when he was 60 and had appeared on the Broadway stage, in dozens of television shows and more than 50 films. He was born Harry Bratsberg in Detroit and went to the University of Chicago but left in the 1930s to sell office equipment in Washington, D.C. As a salesman during the Depression he had free time, so he joined a theater group. In 1937 he went to New York City and appeared in several Broadway productions, before moving to Hollywood in 1941 and going by the name Henry Morgan, and later Harry Morgan appeared in “High Noon” (1953), “Inherit the Wind” (1960), and his personal favorite, 1943′s “The Ox-Bow Incident.” One of his early TV credits was “December Bride,” in which he played Pete Porter, the wry-humored, henpecked neighbor who cracked jokes about his unseen wife. He received eight Emmy nominations for the M*A*S*H role and won once, in 1980, the same year he was nominated for directing an episode of “M*A*S*H.”