WASHINGTON — The building is as important socially as it is architecturally. The official opening of the 410,000-sq.-ft., LEED Gold National Museum of African American History and Culture kicked off with a ribbon ceremony featuring President Barack Obama in September 2016, but initial design concepts started a decade earlier. In 2012, Clark/Smoot/Russell (CSR), the general contractor, broke ground on the project. The museum features gallery spaces for historic artifacts, a theatre, ...

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