The Clintons, Barack Obama, and Mike Pence were loudly booed by the crowd watching the event on screens from the Capital One Arena

As former U.S. President Jimmy Carter's funeral got underway, former presidents and first ladies were seen greeting each other before heading to their seats — but some pointedly avoided the Trumps

Trump Supporters Boo Mike Pence, Hillary and Bill Clinton and Kamala Harris Prior to Donald Trump Becoming President

As Donald Trump prepares to be sworn in for his second term, a bevy of political leaders, tech CEOs, celebrities and others are in attendance in the U.S. Capitol.

A rare, frosty handshake between Donald Trump and the former vice president who defied him. An awkward ghosting. And warm, unexpected smiles. Here’s how the scenes unfolded.

Space is extremely limited in the Capitol Rotunda, but they found seats for Trump foe Mike Pence, UFC CEO Dana White, and podcaster Joe Rogan.

Jimmy Carter nodded politely toward Ronald Reagan at the Republican's inauguration. Richard Nixon clasped John F.

Bill Clinton. George W. Bush. Barack Obama. Donald Trump. Joe Biden.

Donald Trump shook hands with Mike Pence at Jimmy Carter's state funeral -- a notable exchange as the two men have not interacted publicly in years.

Former U.S. presidents attended Jimmy Carter's funeral on Thursday. Chip Somodevilla / Getty Images There's Al Gore, Mike Pence, Karen Pence, Bill Clinton, Hillary Clinton, George W. Bush, Laura Bush, Barack Obama, Donald Trump, Melania Trump, Joe Biden ...

A makeshift grandstand is erected next to the Capitol and hundreds of thousands people line the National Mall.

Melania Trump and Jill Biden both wore outfits by American designers to Donald Trump's inauguration.