The green shaded area in this aerial photo marks the proposed site of the Pentagon Memorial. It abuts the section destroyed Sept. 11, 2001, when terrorists slammed a hijacked airliner into the building and killed 184 persons. (DoD photo) The green shaded area in this aerial photo marks the proposed site of the Pentagon Memorial. It abuts the section destroyed Sept. 11, 2001, when terrorists slammed a hijacked airliner into the building and killed 184 persons. (DoD photo) SHARE: Download: Full Size (0.43 MB) Credit: VIRIN: 700385-Z-VSE73-513.jpg Photo Gallery