Helicopter Was Seen Circling Overheard Just Before the Pentagon Attack on 9/11

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This Priest Witnessed the 9/11 Pentagon Plane CrashSee more

AS IT HAPPENED - The 9/11 Pentagon AttackSee more

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Crash survivor to 911: I'm the only one who survivedSee more

Watch: Never seen before pictures of 9/11 Pentagon attackSee more

Photo exhibit shows never-before-seen objects from 9/11 attacksSee more

He witnessed 9/11 from a helicopterSee more

9/11: A LEGO Tribute. Never ForgetSee more

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9/11: plane debris discovered 11 years later | Channel 4 NewsSee more

60 Minutes 9/11 Archive: The Miracle of the PentagonSee more

9/11 Impact Anatomy | National GeographicSee more

The Top Secret Tapes | 9/11: The Final Moments of Flight 93 | HistorySee more

Police helicopter footage of 9/11 attacks | ABC NewsSee more

Remembering 9/11: VCU professor witnessed plane crashing into the PentagonSee more

9/11 audio recordings offer dramatic timelineSee more