According to a report released by the National Park Service on Thursday, the project could seriously undermine the value and visibility of major historic sites in Washington, D.C. without the construction of the 250-foot-tall Lincoln Memorial and Memorial Bridge, or Triumphal Arch, which President Donald Trump is promoting. The National Park Service's official assessment report states that the project could seriously undermine the value and visibility of major historic sites in Washington, D.C. The National Park Service's official report states that the project is expected to be a major historical landmark in the United States, and that the National Park Service's "construction of the National Park Service" and the National Park Service's "construction of the National Park Service" are expected to be a major historical landmark in the years ahead.