** FILE ** President Obama and first lady Michelle Obama observe the Martin Luther King Jr. Day holiday by participating in a community service project at the Stuart Hobson Middle School in Washington on Monday, Jan. 17, 2011. Mrs. Obama is surprised by everyone singing "Happy Birthday" to her as she arrived; today is her 47th birthday. The Obamas were joined by their daughters, Malia (right), 12, and Sasha, 9, embraced by the first lady. (AP Photo/J. Scott Applewhite)
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