The Minneapolis Institute of Arts is embroiled in a controversy that is sweeping museums across the country. Last night on ABC's "Nightline" program, a French family claimed one of the M.I.A.'s paintings was stolen by the Nazis' during World War II, and belongs to them. The Institute has launched its own investigation into the history of the painting, and believes it may have uncovered evidence that conflicts with the family's claim. Minnesota Public Radio's Chris Roberts has more.