World Trade Center graffiti
The words on beams, walls and stairwells of the skyscraper that replaces the twin towers lost on Sept. 11, 2001, form the graffiti of defiance and rebirth.
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Michael Chertoff
This Jan. 15, 2013 photo shows graffiti left by Michael Chertoff, the former director of Homeland Security, on a steel column on the 104th floor of One World Trade Center in New York.
Credit: AP Photo/Mark Lennihan
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