Defense Secretary says National Guard troops to leave by mid-March, but long-term security concerns linger

America’s seat of government is ringed by two enormous fences, festooned with concertina wire. Armed guards in camouflage roam the grounds. The current perimeter pushes out several blocks from the Capitol itself on the north, nearly to Union Station. Only those who work on Capitol Hill are allowed in. 

What say you, Sir Isaac Newton?  We witnessed that around Washington, D.C., after 9/11. Security officials hardened federal facilities in the nation’s capital into a citadel. Walls. Fences. Jersey barricades. Posts. Armed patrols. Sniffer dogs.  Those things will never disappear.