'Green Zone' in the heart of DC: Secret Service sets up lockdown perimeter days out from Biden's inauguration as 20,000 National Guard troops mobilize, razor wire is installed and the National Mall is shut down to fortify Washington The Secret Service, who is in charge of all inauguration security, has released its restricted access plan, which includes what the agency is calling a 'Green Zone' in the heart of DC Most of downtown DC is now off-limits to traffic and has already drawn comparisons to Baghdad's high-security zone In extraordinary scenes out of DC, thousands of armed military members are patrolling the streets and anti-climb steel fences and road blocks continue to be installed