This year marks 78 years since the Pentagon's construction was completed back in 1943 in the #usa . This is a quick look back at how such a huge building came to be, why it was built, and why it got it's iconic 5-sided shape in the first place. An Icon in #America History and its chief #military Building "The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement." Credit to : Video by Senior Airman Kevin Long AFN Spangdahlem