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| Twin Towers Photo courtesy of World Trade Center Disaster Information |
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| Twin Towers of Light courtesy of World Trade Center Disaster Information |
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| One World Trade Center lit up in preparation of 10th anniversary of 9/11 courtesy of The Dallas Morning News photography blog |
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| The Pentagon photo courtesy of an educational website |
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| The Pentagon on 9/11 photo courtesy of S.E.M.P. Pentagon 9/11 Memorial post |
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| Flight 93 site photo courtesy of usnavyseals.com |
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| Flight 93 temporary memorial photo courtesy Gary Palarma |
