People walk by the World Trade Center site before ceremonies marking the 11th anniversary of the September 11, 2001 attacks on the World Trade Center at Ground Zero in New York

 
People walk by the World Trade Center site before ceremonies marking the 11th anniversary of the September 11, 2001 attacks on the World Trade Center at Ground Zero in New York
People walk by the World Trade Center site before ceremonies marking the 11th anniversary of the September 11, 2001 attacks on the World Trade Center at Ground Zero in New York September 11, 2012. REUTERS/Shannon Stapleton