Obama urges service, unity on 9/11 anniversary
11SEP-OBAMA
Credit: AP
El presidente Barack Obama, al centro, y la primera dama Michelle Obama, segunda de derecha a izquierda, rinden honor a un militar enterrado acompa�ados por otros visitantes en el Cementerio Nacional de Arlington, el s�bado 10 de septiembre del 2011, en Arlington, Virginia. (Foto AP/Carolyn Kaster)
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