Inauguration: 3

 Inauguration of Joe Biden

Travel Restrictions and Site Closures After the deadly storming of the Capitol, organizers and officials made an unprecedented effort to deter people from visiting Washington, D.C. during the week of the inauguration over concerns of political violence. Efforts include: D.C.

Mayor Muriel Bowser urged tourists not to visit the city during the week of the event,  and the Office of Personnel Management asked federal agencies to allow federal employees to work remotely during the week. The National Mall, which served as a non-ticketed viewing area in past ceremonies, and Washington Monument at its geographic center will be closed to the public. Much of the surrounding downtown area near Capitol Hill, Union Station, the Lincoln Memorial, and White House came under significant parking restrictions, and road closures remaining in effect until January 21, the day after the inauguration.

The WMATA announced the closure of 13 Metrorail stations, beginning on January 15 and extending to January 21, "to keep the public safe" and to "discourage travel within the secure zone"; the stations that remained in operation running on a Saturday schedule. Metrobus service was also modified, with routes changed due to the security perimeter. The Postal Service will temporarily remove or lock public post boxes and suspend mail collection in Washington and several major U.S. cities to "protect postal property, employees, and the public" in the event of civil unrest.

Airbnb canceled all reservations in the city, major airlines banned incoming travelers from checking firearms on board, a local hotel workers' union called on hotels to restrict guests to those providing inauguration security, and many parking garages around the Capitol will be closed or rerouted.

MARC Train and Virginia Railway Express commuter rail service from suburban Maryland and Virginia, respectively, will be suspended on the days leading up to and including Inauguration Day.

Amtrak issued a travel advisory in Washington, D.C. and increased security, with Northeast Regional service operating south of the city into Virginia to be halted on January 19–20.

The State of Virginia announced on January 15 that, as part of an agreement with the U.S. Secret Service, four bridges over the Potomac River connecting Virginia to D.C.—Theodore Roosevelt, Arlington Memorial, Interstate 395, and 14th Street—would be closed to vehicular and pedestrian traffic for a 48-hour period over the inauguration, from 6 a.m. on January 19 to 6 a.m. on January 21.

On January 15, the House Oversight Committee asked 27 transportation and hotel companies, including Avis, Hertz, Marriott, and Hyatt, to implement screening procedures to prevent the use of their services by domestic terrorists targeting the inauguration.

Arrests and Incidents On January 15, Capitol Police arrested a 31-year-old man from Front Royal, Virginia carrying an "unauthorized" inauguration credential after he attempted to access a restricted area on the Capitol grounds. The man had attempted to enter a secure checkpoint in his pickup truck, and upon questioning from police volunteered that he had a Glock in the center console; on later inspection, police said they also found more than 500 rounds of ammunition, as well as two dozen shotgun shells in the truck.  The man, claiming to be a private security guard, said he had been aiding the security work downtown ahead of the inaugural ceremony. He acknowledged having the loaded gun and shotgun shells, but denied driving with more than 500 rounds of ammunition. He said it was an "honest mistake" and that he had forgot to take the weapon out of his truck before coming to D.C., saying he had mistakenly gotten lost in the city but used the inauguration credential he was granted.  The man was charged with carrying a pistol without a license, possessing an unregistered firearm and possessing unregistered ammunition. The Washington Post reported that the man was not tied to extremism and cooperated fully with police.  He was released on personal recognizance pending charges and instructed not to visit DC during the inaugural events except for court proceedings.

On January 17, a 22-year-old avowed Trump supporter from Gordonsville, Virginia was arrested near the Capitol complex, carrying a Glock 22 handgun, three high-capacity magazines, and 37 rounds of unregistered ammunition. The man was arrested on charges of carrying a pistol without a license, possessing a large-capacity ammunition feeding device, and possessing unregistered ammunition.  In a separate incident the same day,  a 63-year-old woman from Stratford, Connecticut claimed to be a law enforcement officer and "a part of the presidential cabinet" after being stopped by Capitol Police at a checkpoint near Union Station; she fled from police before she was arrested. The woman underwent a psychiatric examination,  and was subsequently charged with impersonating a law enforcement officer, failing to obey an officer, and fleeing an officer.

Also on January 17, Couy Griffin, a county commissioner in Otero County, New Mexico and founder of the "Cowboys for Trump" group, was arrested in Washington, D.C. Griffin had participated in the January 6 Capitol riot, and had vowed to return to D.C. for the inauguration, armed with guns, and to hold a rally that would end with "blood running out of" the Capitol. Griffin was charged with knowingly entering or remaining in a restricted building without lawful authority.

On January 18, the Capitol complex, where a dress rehearsal for the ceremony was due to take place, was evacuated due to a fire at a homeless encampment outside in the 100 block of H Street SE, to which D.C. Fire and EMS responded.  A public address system alerted people on the Capitol grounds  and members of Congress were advised to shelter-in-place via email. A military band and individuals standing in as participants in the inaugural ceremony were forced to evacuate the inaugural platform. The small fire was promptly extinguished and caused one non-life-threatening injury. The blaze produced a cloud of smoke that was visible over the Capitol.

https://en.wikipedia.org/wiki/Inauguration_of_Joe_Biden