Trump's Refusal to Attend Biden's Inauguration Breaks a Long Tradition of Polite Presidential Transitions

The inauguration of Joe Biden as the 46th president of the United States is going to look vastly different than the ceremonies of his predecessors, and the most striking difference may be that outgoing President Donald Trump will not attend. George Washington University history professor Edward Berkowitz joined LX News to explain what usually goes down on Inauguration Day and why Trump's refusal to attend is so unusual.