Carrie Bergonia of Pennsylvania

Photo: Chris Pedota/Getty Images

Carrie Bergonia of Pennsylvania looks over the name of her fiance, firefighter Joseph Ogren, at the 9/11 Memorial during ceremonies on Sept. 11, 2013 — the 12th anniversary of the terrorist attacks on the World Trade Center in New York City.

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Family members of Ji Yao Justin Zhao pay their respects

Photo: Mary Altaffer/Getty Images

Family members of victim Ji Yao Justin Zhao pay their respects at the South Pool of the 9/11 Memorial during this year's anniversary ceremonies in New York City.

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Ruth Lamagne remembers her son who was killed on 9/11

Photo: Alejandra Villa/Getty Images

Ruth Lamagne pauses at the 9/11 memorial to remember her son, Port Authority police officer David Lamagne, who was killed during the attacks in New York City.

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9/11 memorial in NYC

Photo: Justin Lane/Getty Images

Flowers and pictures are left along the North Pool of the 9/11 Memorial during ceremonies for the 12th anniversary of the 9/11 attacks in New York City.

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Katya Busoolo pauses to remember her mom Irina Kolpakova at the 9/11 Memorial

Photo: Alejandra Villa/Getty Images

Katya Busoolo pauses at the 9/11 Memorial to remember her mom Irina Kolpakova, who was killed in the attacks 12 years ago.

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Family members copy an engraving of David Fodor's name at the 9/11 memorial

Photo: Alejandra Villa/Getty Images

Loved ones copy an engraving of a victim's name at the 9/11 Memorial in New York City.

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 A woman pauses along the edge of the North Pool at the 9/11 Memorial

Photo: Justin Lane/Getty Images

A woman pauses along the edge of the 9/11 Memorial's North Pool during ceremonies for the 12th anniversary of the terrorist attacks in New York City.

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Catie Leary is a photo editor at Mother Nature Network. Follow her on Twitter and Google+.