President Barack Obama, first lady Michelle Obama, Vice President Joe Biden, and others put their hands on their hearts during the playing of Taps on the South Lawn of the White House in Washington, Thursday, Sept. 11, 2014, as they mark the 13th anniversary of the 9/11 attacks.
President Barack Obama, first lady Michelle Obama, Vice President Joe Biden, and others put their hands on their hearts during the playing of Taps on the South Lawn of the White House in Washington, Thursday, Sept. 11, 2014, as they mark the 13th anniversary of the 9/11 attacks. Charles Dharapak AP
President Barack Obama, first lady Michelle Obama, Vice President Joe Biden, and others put their hands on their hearts during the playing of Taps on the South Lawn of the White House in Washington, Thursday, Sept. 11, 2014, as they mark the 13th anniversary of the 9/11 attacks. Charles Dharapak AP

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