National Guard troops are being sent to Washington DC from around the country to prevent any continuation of the deadly riot that erupted on January 6.
At all 50 state capitols, the FBI has warned of potentially armed marches by pro-Trump demonstrators. Meanwhile, DC's National Mall has been closed.
Amid tightened defense, barricades line the streets of the capital.
Because of the Covid-19 pandemic, the Biden team had already advised Americans to avoid traveling to the capital, and local officials said people should watch the inauguration remotely.
Some militias have told their members not to participate, citing heavy security or saying they are police traps for the scheduled events.
