【Sisters Slave】

It was a question many people had during President Barack Obama's heartbreaking farewell speech: Where was Sasha,Sisters Slave the Obamas' younger daughter?

Michelle and Malia were both attending the president's address in Chicago.

People on Twitter started conjecturing theories about Sasha after Obama delivered a moving tribute to his daughters.

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"Malia and Sasha, under the strangest of circumstances, you have become two amazing young women, smart and beautiful, but more importantly, kind and thoughtful and full of passion," Obama said. "You wore the burden of years in the spotlight so easily. Of all that I’ve done in my life, I’m most proud to be your dad."

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Malia wiped away a stream of tears. But where was Sasha?

According to a White House official, she stayed back in Washington, D.C. because she has a science exam at school today. Yep, you read it right, Sasha Obama missed her father's farewell address because of her sense of duty:

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Good luck on your exam, Sasha.

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