1. President-elects say their name after the first "I".
2. Presidents raise their right hand and put their left hand on the Bible while swearing in.
3. It is not mandatory for presidents to swear on a Bible, but it is mandatory for them to take the oath.
4. It is not mandatory that the Chief Justice swear in presidents.
5. Lyndon B. Johnson was sworn in on Air Force One with a Catholic missal instead of a Bible.