Timeline: President Obama's presidency

A look back through President Barack Obama's presidency as the 44th President of the United States of America.

Obama marks Tucson shooting

Credit: Getty Images, 2011

Jan. 10, 2011

Obama marks Tucson shooting

President Obama, joined by first lady Michelle and White House staffers, led a moment of silence on the South Lawn to honor the victims of the Tucson, Ariz., shooting. Six people were killed and 12 injured, including Representative Gabrielle Giffords, in the Jan. 8, 2011 shooting.

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