Analysis of information sources in references of the Wikipedia article "The Pentagon" in English language version.
The first tenants moved into the building in April 1942, several months before the building was finished.
Three shifts worked 24 hours a day, every day, building the Pentagon, wedge by wedge.
One section was completed on April 30, 1942 [sic] and the first tenants moved in.
Three shifts worked 24 hours a day, every day, building the Pentagon, wedge by wedge.
One section was completed on April 30, 1942 [sic] and the first tenants moved in.
The first tenants moved into the building in April 1942, several months before the building was finished.