 It feature exhibits on the B Reactor — the world's first plutonium production reactor — and its importance, models of the reactor and surrounding buildings, a documentary film ("Hanford's Secret Wartime Mission"), and vignettes and education materials on the history of the Hanford site.The exhibit was developed in partnership with the B Reactor Museum Association, the Hanford Reach National Monument Heritage and Visitor Center, and the Columbia River Exposition on History, Science and Technology.The Atomic Heritage Foundation has created several books dealing with the Manhattan Project.