On Inauguration Day, both the outgoing and incoming US presidents issued controversial pardons that expanded the power to new limits.
Joe Biden gave family members pre-emptive pardons, while Donald Trump pardoned nearly 1,600 people charged with crimes related to the riot at the US Capitol on 6 January 2021.
The BBC's Analysis Editor Ros Atkins looks at the questions raised about the President's view of what happened that day at the Capitol - and about how the American justice system works.