Editing Cathedral of Learning (section)

===World War II===
On July 26, 1940, as [[World War II]] was starting, a bomb threat was made against the structure with extra guards being posted to secure it and the authorities not ruling out possible wartime sabotage.<ref>{{cite web|url=https://news.google.com/newspapers?id=jHAhAAAAIBAJ&dq=skyscraper+pittsburgh&pg=4009,4855955|title=Reading Eagle - Google News Archive Search|website=news.google.com|access-date=March 15, 2018}}</ref>

During the war effort, the cathedral was assigned to house, feed and instruct roughly 1,000 of the Army Air Corps (forerunner of today's [[U.S. Air Force]]) as well as dozens of Army engineers. The building had at least 12 floors dedicated for military use from 1943 until 1945.<ref>{{cite web|url=https://news.google.com/newspapers?id=Q6AiAAAAIBAJ&dq=skyscraper+pittsburgh&pg=2620,162383|title=The Daily Times - Google News Archive Search|website=news.google.com|access-date=March 15, 2018}}</ref>