The triumphal arch President Trump wants built at the west end of the National Mall would not only commemorate the country's 250th anniversary. According to the president, it would also hold snipers, drones and ammunition.
Trump announced the change on Saturday, September 20, 2026, in a post saying he had acted "at the strong request of the United States Military, and for National Security purposes" and had "agreed to convert the magnificent Triumphal Arch" into what he called a top-grade military complex. He described positions for snipers on the roof and on the plaza, storage for drones and large quantities of ammunition.
What is being proposed
The structure would stand 250 feet tall — roughly twice the height of the Lincoln Memorial — on the axis between that memorial and the Arlington Memorial Bridge, which leads to Arlington National Cemetery.
Planning documents reviewed by ABC News say the height was chosen deliberately: smaller options "were not considered representative of this milestone," the 250 years since independence. The same documents describe a build of seven phases over two to three years, worked year-round in two 10-hour shifts a day, with roughly five months of continuous heavy-equipment operation for the foundation alone.
The approvals that do not exist yet
The National Capital Planning Commission has not approved the design. At a recent hearing the commission asked the administration to address several unresolved design issues. ABC News reported that Trump has falsely claimed the design was already approved.
A National Park Service review in August found the project would have adverse effects on nearby historic landmarks and sightlines, and the agency nonetheless backed it. More than 100,000 public comments were filed with the Park Service.
Vietnam War veterans sued earlier this year to stop construction, arguing that Congress, not the executive, must authorize a permanent monument of this kind on federal parkland. In a recent filing they wrote: "With every passing day, Defendants' arch moves closer to construction." The Justice Department has responded that the plaintiffs lack standing and that the case is premature. Suits against this and related projects have so far failed to halt work.
The unusual part
Monuments on the Mall are contested all the time; the fights are normally about design, cost and who gets commemorated. Turning one into an operational military installation is a different category of question, and it raises practical ones the planning record has not yet answered — among them how a 250-foot structure with drone operations fits into the already tightly restricted airspace above Washington, where flight paths into Reagan National run close by.
Trump has used a similar national-security framing for other construction on federal property in Washington, including the ballroom project at the White House.
Reporting from NPR, Axios and ABC News.
