A painting created by American artist John Sloan 75 years ago and missing for 65 of them now hangs on a wall inside the Detroit Institute of Arts. Sloan painted "Fourteenth Street at Sixth Avenue" in 1934 for the Public Works of Art Project, which was created to employ artists during the Great Depression. Four years later, it vanished. The painting's wily provenance includes a congressman who pulled it from the trash pile.