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Enduring Mona Lisa mystery to finally be solved?

ROME - Italian researchers have announced a plan to dig up bones in a Florence convent in hopes of identifying the remains of a Renaissance woman long believed to be the model for the Mona Lisa.

The researchers hope that the project can help answer some of the enduring mysteries surrounding Leonardo da Vinci's masterpiece, including whether the woman, Lisa Gherardini, was indeed the model.

They launched their project in Florence Tuesday.

Project leader Silvano Vinceti said the excavations in the Convent of St. Ursula, in central Florence, are scheduled to begin at the end of April.

Lisa Gherardini was the wife of a rich silk merchant named Francesco del Giocondo. Tradition has long linked her to the painting, which in Italian is known as "La Gioconda."

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George Washington's final years

Through eight grueling years of the Revolutionary War, and another eight as the first President of the United States, George Washington was sustained by a dream, of the day he would return to Mount Vernon, his beloved plantation high above the Potomac River, where at 65 years old he aspired to a peaceful retirement as a farmer. But that's not quite how it turned out. His post-presidency was filled with controversy, intrigue, and personal torment. CBS News chief Washington correspondent Chip Reid visits Mount Vernon, and talks with Jonathan Horn, author of "Washington's End: The Final Years and Forgotten Struggle."

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