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Frist lady Michelle Obama, Malia Obama, Sasha Obama, and U.S. President Barack Obama walk across LaFayette Park to St. John's Episcopal Church on September 19, 2010 in Washington, DC. The President has no public events scheduled for today. (Photo by Dennis Brack-Pool/Getty Images)

The Obama girls grow up

As their dad Barack Obama accepts the nomination to run for his second term as president, Yahoo looks back at how much Sasha and Malia have grown up over the last four years.