EE.UU. conmemora el 10º aniversario del 11-S
U.S. President Barack Obama (behind glass, center L) delivers remarks as first lady Michelle Obama, former President George W. Bush and former first lady Laura Bush (R-L) look on during ceremonies marking the 10th anniversary of the 9/11 attacks on the World Trade Center, in New York, September 11, 2011. REUTERS/Larry Downing (UNITED STATES - Tags: ANNIVERSARY DISASTER)
A singer performs during the start of the ceremonies marking the 10th anniversary of the 9/11 attacks on the World Trade Center, in New York September 11, 2011. REUTERS/Gary Hershorn (UNITED STATES - Tags: ANNIVERSARY DISASTER)
Actors dressed as US soldiers wait to pose for tourists near a placard reading "We will not forget September 11, 2001" and signed "We Berliners" at Berlin's Checkpoint Charlie (the former allied checkpoint between east and west Berlin) September 11, 2011, on the tenth anniversary of the 9/11 terrorist attacks in the US. Germany marked the aniversary with an ecumenical memorial service for the victims at Berlin's American Church led by representatives of the Christian, Jewish and Islamic faiths and attended by President Christian Wulff. AFP PHOTO / JOHN MACDOUGALL