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In Photos: 18th Anniversary of 9/11 Attacks

Slide 2 of 40: NEW YORK, NY - SEPTEMBER 11: Kate Sylvain and her son Francis, 5, visit the National September 11 Memorial on the 18th anniversary of the 9/11 attacks September 11, 2019 in New York City. Throughout the United States services are being held to mark the 18th anniversary of the 9/11 terrorist attacks to remember the 2,977 people who were killed in New York, the Pentagon and in a field in rural Pennsylvania.  (Photo by Drew Angerer/Getty Images)

Kate Sylvain and her son Francis, 5, visit the National September 11 Memorial on Sept. 11, in New York City.

© Gary Hershorn/Getty Images
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