This week on "Sunday Morning" (July 31)

Host: Mo Rocca

COVER STORY: The harsh reality of art collecting — and forgeryArt forgery — creating and selling artwork falsely credited to famous artists — is almost as old as art itself. In 2011, an esteemed New York gallery closed its doors after selling $80 million worth of fake art. Of course, authenticity is at the heart of any artwork's true value. But, as correspondent Erin Moriarity shows us, sometimes the problem lies in the proof.

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