The FBI has recently made public several photos from the investigation inside the Pentagon after the attacks of September 11, 2001.
The images, posted to the FBI's records vault, give a new look into the destruction seen firsthand by emergency personnel responding to the attack.
American Airlines Flight 77 was hijacked and flown into the western wall of the Pentagon on the morning of September 11, in coordination with the attacks on the World Trade Center in New York City less than an hour earlier, and followed by the crashing of Flight 93 in Shanksville, Pennsylvania.
Five floors of the affected area of the Pentagon collapsed shortly after the impact.
All 64 people aboard the plane were killed, as well as 125 people inside the Pentagon.
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