The 25,000 National Guard troops that had been assigned to Washington had shut down any street entrance to the National Mall, Capitol, and White House days ago. The Capitol Police, Secret Service, and National Guard couldn’t do it by themselves. They relied on local police officers like those from Miami-Dade who helped secure the parade route, as well as officers from Miami Beach and Coral Gables. Joe Biden was sworn in as the United States' 46th president. NBC 6's Phil Prazan breaks it down from the nation's capital. When Biden was being driven to Arlington National Cemetery, the street was not only shut down, but concrete barricades had been put up on both sides, and 8-foot-high fences prevented anyone from getting into the street — a safe corridor for a single drive.