
Smoke billowing from a hole after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va. Sept. 11, 2001.
EPA via FBI

FBI search the interior after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Emergency services search after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

FBI investigates after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Debris on the ground after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Members of the emergency services holds a U.S. flag after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An exterior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An exterior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Members of the FBI investigate after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An interior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Rescue crews use a crane to sift through debris after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An aerial view of the exterior damage after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept.11, 2001.
EPA via FBI

FBI investigators work after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept.11, 2001.
EPA via FBI

Damage done to an inner wall and debris after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Mangled debris from a plane after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Mangled debris from a plane after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An exterior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An interior and exterior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An exterior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Flames and smoke billowing from a hole in the exterior wall after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va. Sept. 11, 2001.
EPA via FBI

An exterior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An exterior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

An interior view of damage done after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI

Members of the FBI investigate after the hijacked American Airlines Flight 77 crashed into the Pentagon in Arlington County, Va., Sept. 11, 2001.
EPA via FBI