Turning the arch into a military complex materially changes the project enough to require supplemental preservation review

Defence of a state against external and internal threats, spanning intelligence services, military operations, counterterrorism and the classification of information. Covers the tension between secrecy and oversight, and the agencies whose work is largely conducted beyond public view.

Federal preservation officials ended Section 106 consultation on September 24, 2026, over President Donald Trump’s proposed triumphal arch near Arlington National Cemetery after failing to reach agreement with Washington and Virginia preservation officials. The action ends mitigation negotiations but does not grant final project approval.