Photograph by George Steinmetz @geosteinmetz / @thephotosociety “Reflecting Absence” is the centerpiece of the 9/11 Memorial and has made the voids left by the destruction the primary symbols of our loss. How this message is visually communicated depends on the time of year. When the plaza’s groves of sweet gum and swamp white oaks are in fall color, the sense of both life and loss flickers across the space. #9/11 #NYFD To see more of New York City from the air, go to @NewYorkAirBook by natgeo

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