"The construction project for the new White House ballroom involves significant, deep excavation to build a "titanium spine" foundation designed to support a structure estimated to be 90,000 square feet" should read:  "The construction project for the new White House ballroom involves significant, deep excavation to build a "titanium spine" foundation designed to support a new Presidential Emergency Operations Center (PEOC)", as inadvertently revealed in Trump's speech at the Kennedy Center