US observes 12th anniversary of 9/11 attacks
Visitors attend ceremonies at the Flight 93 National Memorial commemorating the 12th anniversary of the 9/11 attacks in Shanksville, Pennsylvania.
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Families of those killed on 9/11 gathered on Wednesday morning in New York, Pennsylvania and Virginia to mark the anniversary of the attacks. Time stood still at the World Trade Center site while families wept for loved ones who perished in the terror attacks 12 years ago.A firefighter stands outside Ladder Co. Number 10 on the corner of Liberty Street and Church St. with the Freedom Tower in the background, during the 9/11 Memorial ceremonies in New York.