Updated

The Trump administration's plan to build a 250-foot arch near one of the busiest runways in the country's airspace over Washington, D.C. has raised safety concerns among aviation experts. The FAA will determine whether the structure poses a hazard to air traffic, but independent experts have already voiced concerns about the risk it could add to an already complicated airspace. The controversy adds to scrutiny of the Trump administration's large-scale monument and construction projects in the capital.