When I came, I didn't do a careful strategy. The Pentagon can visit, and there is a visitor center that needs to be reserved 2 weeks in advance. It is a pity that the temporary non-in, the security staff is a standard American soldier, tall and handsome and friendly, repeatedly explained that you have to book on the computer in advance, and there is a big police dog next to you. Very dazzling, the photo person dizzy, I followed the pedestrians forward and walked unknowingly to the office area, met a black official, very politely said that there is no photo here, there is a visitor center to visit. When I left Washington, I saw the Pentagon in full view on the plane, and I was very emotional, really pentagon.