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In this handout provided by the White House, (L - R) First Lady Michelle Obama, Malia Obama, U.S. President Barack Obama and Sasha Obama, sit for a family portrait in the Oval Office on December 11, 2011 in Washington, D.C. (Photo by Pete Souza/White House via 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.