WASHINGTON — President Donald Trump said Sunday that the massive arch he plans to build between the Lincoln Memorial and Arlington National Cemetery would be converted into a “top grade military complex” capable of hosting drones and snipers while storing ammunition.

It is the latest example of Trump insisting that his initiatives to beautify the White House and the capital also serve a defensive purpose. The president has been calling the new White House ballroom a “military complex” and arguing it is necessary for national security. The Pentagon said it had no information beyond the president’s statement, offering no detail on the military request he described.

In a social media post, the Republican president said he had agreed, at the “strong request” of the military, to convert the planned 250-foot-tall (76-meter) memorial arch “into a top grade Military Complex/Triumphal Arch, to house, store, and have the rapid ability to use large numbers of drones, plus Snipers, on both the roof and plaza areas, and additionally have and hold large quantities of sniper ammunition in storage.”

The arch is proposed for a circle adjacent to the Memorial Bridge, a heavy-traffic area and one of a handful of connecting bridges across the Potomac River between the nation’s capital and northern Virginia. As described, the plan would place those drone, sniper, and ammunition functions at that heavily traveled crossing.

The announcement also comes as the arch, like several of Trump’s other projects, faces legal challenges. Though the arch has received early approval from the U.S. Commission of Fine Arts, whose members were all tapped by Trump, a group of three veterans and an architectural historian has sued, saying the project needs to be approved by Congress.

Groundbreaking for the arch had been expected to take place sometime this month. The project has not yet received final approval from the National Capital Area Planning Commission, which greenlit the site and preliminary plans at its July meeting. The commission is expected to take up the matter again this fall, making that review and the pending lawsuit the key developments to watch for a project that has yet to receive final sign-off.

The arch is one of several projects through which the Republican president is pursuing a lasting imprint on Washington. Among the others are the White House ballroom, the renaming and renovation of the Kennedy Center, the refurbishing of the Lincoln Memorial Reflecting Pool, and the rebuilding of a golf course in East Potomac Park that could significantly reduce the public’s access to running and biking paths.

This story was originally featured on Fortune.com.