Prelude 9/11 morning Flight 11 hijacked Flight 175 hijacked WTC 1 hit Flight 77 hijacked WTC 2 hit Flight 93 hijacked Pentagon hit WTC 2 collapses Flight 93 crashes WTC 1 collapses WTC 7 collapses Epilogue

Historical Office (military)

Historical Office, Office of the Secretary of Defense is tasked with collecting and preserve historical documents etc. and to make the material available to the public.

Pentagon 9/11

In 2007, the office published a historical account of the attack on the Pentagon, the subsequent damage on the building, and the forensic investigations that followed.

Pentagon 9/11,
Defense Studies Series
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