HRA completed a temporary exhibition for the U.S. Army Corps of Engineers, Office of History. On display in the Pentagon, the exhibition tells the nearly 250-year history of the Corps, from the American Revolution to the present. HRA is currently developing a second exhibition for the Office of History, to be installed outside the Chief of Engineers’ headquarters in the Pentagon. It will focus on twenty-first century topics, such as military engineering, civil works, and the Corps’ environmental mission.