A sampling of the hats, coats and gowns that have marked the ceremonies for more than 100 years.
“Tradition. Respect. Class. Remember that?” asked Pete Souza.
The former first ladies joined the international "One World: Together at Home" event.
The "Ellen" host had a message for critics after she was criticized for laughing it up with George W. Bush at a Dallas Cowboys game.
The intimate ceremony was held at the Bush family compound in Kennebunkport, Maine.
It's the latest time cameras have caught their unlikely friendship.
The most American of accidental favs.
Sometimes, former first ladies see it the same way.
“President Trump could stop this policy with a phone call,” Sen. Lindsey Graham (R-S.C.) said Friday.
"People on all sides agree that our immigration system isn’t working, but the injustice of zero tolerance is not the answer.”