US Inauguration Day 2021: This is what happened in the ceremony

Before Biden, Harris took the oath of office on two Bibles held by her husband Doug Emhoff, one of them that belonged to Regina Helton, whom she has called her "second mother" and another belonged to Thurgood Marshall, the first African American Supreme Court Justice.

She was sworn-in by Supreme Court Justice Sonia Sotomayor, the first Latina to serve on the court.

Next, Biden swore on a hefty family bible that his wife Jill Biden held. Chief Justice John Roberts gave him the oath of office.