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U.S. President Barack Obama with his daughters Malia (C) and Sasha (R) walk the family's new Portuguese water dog Bo, during the dog's introduction to the White House press corps on the South Lawn of the White House April 14, 2009 in Washington, DC. The six-month-old puppy is a gift from Sen. Edward M. Kennedy (D-MA) who owns several Portuguese water dogs himself. This breed of dog is considered a good pet for children who have allergies, as Malia does. (Photo by Win McNamee/Getty Images)

The Obama girls grow up

September 7, 2012

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.