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

Former Presidents Barack Obama, Bill Clinton and George W. Bush will come together again next week for the inauguration of President-elect Donald Trump, but one spouse, Michelle Obama, is sitting this one out.

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

Former first lady Michelle Obama will not attend the inauguration of President-elect Trump on Monday, the second time in two weeks that she will be absent from a significant event.

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.

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

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 ...

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 ...