The inauguration itself, one unlike any other in US history, served as a stark reminder of both the tumult that defined the Trump era as well as the pandemic that still threatens the country.
Amid warnings of possible renewed violence, thousands of armed National Guard troops circled the Capitol in an unprecedented show of force. The National Mall, typically packed with throngs of supporters, instead was filled with nearly 200,000 US flags. Attending dignitaries - including former US Presidents Barack Obama, George W. Bush and Bill Clinton - wore masks and sat several feet apart.