By John Solomon
How the government's punishing of the exposure of official wrongdoing can linger for years

Leonardo da Vinci's "Mona Lisa"(1501-1516) is regarded as one of the world's finest masterpieces and greatest mysteries. For centuries, art historians and literary biographers have written volumes discussing every geometrical line, color, angle and shape in this beautiful painting.
BERLIN (AP) - A researcher has uncovered evidence that apparently confirms the identity of the woman behind the "Mona Lisa's" iconic smile, Germany's University of Heidelberg says.